Moving beyond a simple “present or absent” designation, researchers created a new classification system that allows for a nuanced understanding of bioluminescence in marine organisms that was unavailable under binary classification systems. The new six-point scale considers varying levels of supporting evidence used to identify bioluminescent species. For example, the splendid ponyfish scores 1 because of inconsistent reports, the emperor squid scores 4 because of its anatomical similarity to known luminous relatives, and the violet cod scores 6 because of substantiated direct observations.
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Verbal·Craft and Structure·Text Structure and Purpose
mediumWhich choice best describes the function of the underlined sentence in the text as a whole?
A
It explains the basis for the new system’s scoring criteria.
B
It explains how the new classification system was derived from the previous binary system.
C
It justifies the need for a new classification system for marine species.
D
It emphasizes the thoroughness of the research conducted.