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Difficulty: HardSentence Fragments, Run-Ons, and Comma Splices

In high-register academic writing, complex multi-clause sentences must adhere strictly to standard English sentence boundaries. Which of the following sentences are grammatically complete and correctly punctuated without any fragments, comma splices, or run-on errors? Select all that apply.

  1. Although the preliminary survey of ancient manuscript fragments suggested a late medieval origin, subsequent radiocarbon dating revealed that the parchment was manufactured in the eighth century; consequently, historians were forced to revise their timeline of regional literacy.Answer
  2. B
    The comparative literature scholars analyzed the translated texts for thematic consistency, however, they failed to account for subtle idiomatic shifts that occurred across successive editions.
  3. Whereas early cognitive psychologists viewed memory retrieval as a passive reconstruction of past events, contemporary neuroscientists argue that each act of recall actively alters the underlying neural network, thereby modifying the memory itself.Answer
  4. D
    Because the macro-economic model failed to integrate real-time market fluctuations and overlooked structural disparities in resource distribution that had persisted for over a decade.
  5. E
    Ethnomusicologists recorded hundreds of hours of traditional oral poetry in remote alpine valleys they hoped these digital preservation efforts would stimulate interest among younger generations.

Answer

The selections beginning with 'Although the preliminary survey...' and 'Whereas early cognitive psychologists...' are both grammatically complete and correctly punctuated without sentence boundary errors.
The sentence starting with 'Although the preliminary survey...' correctly connects a dependent clause to an independent clause with a comma and attaches a second independent clause using a semicolon and conjunctive adverb '; consequently,'. The sentence starting with 'Whereas early cognitive psychologists...' cleanly joins a subordinate contrasting clause to an independent main clause followed by a participial modifier. Both maintain valid sentence boundaries.

Step-by-Step Solution

1
Analyze each option to identify whether all clauses form a complete syntactic unit.
Determine if any selection lacks a main independent clause or consists solely of a subordinate structure.
Sentence fragments fail to express a complete thought because they lack a primary independent clause.
2
Examine the boundary punctuation between independent clauses.
Identify improper joining mechanics such as commas without coordinating conjunctions or missing punctuation.
Connecting two independent clauses with only a comma creates a comma splice, while omitting punctuation entirely yields a fused run-on.
3
Verify punctuation rules for conjunctive adverbs.
Confirm that transitional adverbs like 'however' and 'consequently' are preceded by a semicolon when joining independent clauses.
Conjunctive adverbs cannot syntactically link independent clauses with a comma alone.

Key Concept

Sentence Boundaries: Fragments, Comma Splices, and Run-On Sentences
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Topics

Sentence Fragments, Run-Ons, and Comma Splices

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