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Expression of Ideas Difficulty: Medium
  • In 2017, a research team led by Mary Caswell Stoddard determined the average lengths of eggs produced by various bird species.
  • Gygis alba is a species of bird in the order Charadriiformes.
  • Gygis alba eggs had an average length of 4.46 cm.
  • Gavia stellata is a species of bird in the order Gaviiformes.
  • Gavia stellata eggs had an average length of 7.22 cm.

Which choice most effectively uses information from the given sentences to emphasize a difference between the eggs of the two species?

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Explanation

Choice B is the best answer. The sentence emphasizes a difference between the eggs of the two species, directly contrasting the shorter average length of Gygis alba eggs (4.46 cm) with the longer average length of Gavia stellata eggs (7.22 cm).

Choice A is incorrect. While the sentence mentions both bird species, it doesn’t emphasize a difference between their eggs. Choice C is incorrect. While the sentence provides information about the two bird species, it doesn’t emphasize a difference between their eggs. Choice D is incorrect. While the sentence provides the average lengths of both species’ eggs, it doesn’t explicitly emphasize the difference between them.