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Difficulty: Very hardMain Idea and Primary Purpose

Passage:
In late twentieth-century historical linguistics, the traditional consensus regarding Indo-European language expansion was dominated by Marija Gimbutas's Kurgan hypothesis, which posited that equine-mounted pastoralists from the Pontic-Caspian steppe spread Proto-Indo-European through military conquest during the early Bronze Age. Conversely, Colin Renfrew proposed an alternative model linking language dispersal to Neolithic agricultural expansion from Anatolia several millennia earlier. For decades, scholarship remained polarized between these mutually exclusive migrationist paradigms. However, recent multidisciplinary research incorporating high-resolution archaeogenetics and ancient DNA sampling has forced a structural synthesis. Ancient genomic data demonstrates massive genetic turnover in Central Europe during the late Neolithic, confirming substantial population movement from the steppe. Crucially, computational phylogenomic dating of language trees simultaneously corroborates an earlier Anatolian divergence for basal branches. Rather than validating one model at the expense of the other, contemporary theorists utilize these dual streams of empirical evidence to construct a multi-phased paradigm: early agricultural diffusion established a dialectal substrate, which was subsequently overwritten and restructured by Bronze Age steppe pastoralist mobility. Consequently, modern linguistic historiography has transcended the simplistic dichotomy of conquest versus peaceful farming expansion, replacing it with an integrated model of sequential demic and cultural transmission.

Which of the following best states the primary purpose of the passage?

  1. To demonstrate how recent empirical findings from distinct scientific disciplines have enabled scholars to synthesize previously contradictory hypotheses regarding language expansion.Answer
  2. B
    To present ancient genomic data that decisively invalidates the Anatolian agricultural expansion model in favor of the Kurgan hypothesis.
  3. C
    To argue that computational phylogenetics is inherently superior to traditional linguistic reconstruction in determining historical population movements.
  4. D
    To detail the specific genetic markers that differentiate Bronze Age steppe pastoralists from Neolithic European agriculturalists.
  5. E
    To forcefully repudiate early twentieth-century linguistic theories as speculative constructs lacking empirical grounding.

Answer

The primary purpose of the passage is to demonstrate how recent empirical findings from distinct scientific disciplines have enabled scholars to synthesize previously contradictory hypotheses regarding language expansion.
The correct answer accurately states the passage's overarching purpose: it traces how two long-standing, opposing models of Indo-European language origin (the Kurgan hypothesis and the Anatolian model) have been integrated into a comprehensive multi-phased framework through recent findings from archaeogenetics and computational phylogenetics.

Step-by-Step Solution

1
Analyze the structural arc of the passage.
Paragraph opens with two competing historical models (Kurgan vs. Anatolian) that polarized scholars for decades, then introduces new multidisciplinary evidence (archaeogenetics and computational phylogenomics).
Identifying the organizational framework helps isolate the author's primary objective.
2
Identify the author's main thesis and conclusion.
The author concludes that contemporary research 'transcended the simplistic dichotomy... replacing it with an integrated model of sequential demic and cultural transmission.'
The conclusion of a Reading Comprehension passage directly signals the primary purpose.
3
Evaluate the answer choices against the overall passage scope.
The option emphasizing the synthesis of previously contradictory hypotheses accurately reflects the passage as a whole, while distractors either focus on single details, overstate the tone, or extrapolate beyond the text.
Main idea options must cover the complete scope without being overly narrow or unjustifiably broad.

Key Concept

Main Idea and Primary Purpose
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Main Idea and Primary Purpose

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