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Difficulty: HardDetermining Paragraph-Level Main Ideas

Adapted from an essay examining the intersection of art and material science in Europe, the paragraph below discusses the impact of synthetic pigments.

Paragraph 2 (lines 15–32)
Before the accidental synthesis of Prussian blue in 1706 by Berlin colorist Heinrich Diesbach, artists had to rely on ultramarine—a luxurious pigment ground from lapis lazuli imported from the remote mines of Afghanistan—for their deepest blues. Ultramarine was so prohibitively expensive that patrons often specified its quantity in contracts, reserving its use for the robes of the Virgin Mary or other central figures to signal piety and wealth. By providing a chemically stable, highly saturated alternative at a fraction of the cost, Prussian blue democratized the color blue, instantly altering the economics of European painting. However, the pigment did more than shift market dynamics; its rapid adoption by painters across the continent sparked a structural revolution in palette design. For the first time, artists could mix deep blues with a variety of yellow and white pigments to produce subtle, lightfast greens and purples, prompting a departure from the stark, color-blocked compositions of the Renaissance toward the fluid, atmospheric landscapes of the Rococo and early Romantic eras.

Which of the following statements best captures the central point of Paragraph 2 (lines 15–32)?

  1. A
    describe the high cost and geographical origins of the lapis lazuli used to create traditional ultramarine pigment
  2. B
    detail the historical progression of synthetic chemistry and its broad role in reshaping the visual arts across several centuries
  3. explain how a newly developed synthetic pigment altered both the economic accessibility and the stylistic composition of European paintingAnswer
  4. D
    suggest that Renaissance painters preferred stark, color-blocked compositions due to the superior chemical stability of ultramarine

Answer

The correct answer is the statement that Prussian blue's synthesis changed the economic accessibility of the color blue and influenced structural composition styles in painting.
The paragraph explains that Prussian blue's accidental synthesis democratized the color blue by offering a stable alternative at a fraction of the cost, and additionally facilitated new mixing options that led to a shift away from Renaissance color-blocking toward Rococo and Romantic landscapes.

Step-by-Step Solution

1
Analyze the paragraph structure and locate the transitional ideas.
The paragraph transitions from the expensive nature of traditional ultramarine to the discovery of Prussian blue, which offered a cheap and stable alternative, ultimately changing palette mixing and compositional styles.
Tracking shifts in paragraph focus helps distinguish between secondary context and the primary thesis.
2
Synthesize the two main consequences of Prussian blue detailed in the text.
The two consequences are economic (democratization and lowering of cost) and stylistic (allowing new mixtures that shifted compositions from color-blocked Renaissance styles to fluid Rococo/Romantic landscapes).
A complete main idea must reflect the paragraph's full scope, not just its opening or closing details.
3
Evaluate the choices against this synthesis, checking for common ACT Reading errors.
The statement regarding economic accessibility and stylistic composition matches the synthesized main idea. Other options present narrow details, broader passage-level ideas, or factual distortions.
Evaluating all distractors ensures that the selected answer uniquely and accurately paraphrases the target paragraph.

Key Concept

Determining Paragraph-Level Main Ideas
Estimated Time:2m 0s
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Topics

Determining Paragraph-Level Main Ideas

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