The chemical composition of Jupiter’s atmosphere is relatively well-known due to the observations made by the Galileo atmospheric probe in 1995. The ratios of helium to hydrogen and phosphorus to hydrogen in Jupiter’s atmosphere are relatively close to the same ratios for the Sun. However, for other elements, Jupiter’s atmosphere has a much greater abundance: the ratio of nitrogen to hydrogen in Jupiter is about 3.5 times as great as that of the Sun; carbon to____and krypton to hydrogen, 2.7 times as great.

Which choice completes the text so that it conforms to the conventions of Standard English?

The change in the punctuation especially, commas, in the choices, is analyzed.

Elements, Comma, Comparison pattern is followed to rule out the right answer.

Can you summarize what you’ve understood in the above steps?

Choice A is incorrect because It lacks punctuation after "hydrogen." A comma or other appropriate punctuation is needed to separate "hydrogen" from the numerical expression that follows to maintain clarity and grammatical correctness.

hydrogen 2.9 times as great;+

Choice B is incorrect because it lacks a semicolon or colon after "great," which is typically used before introducing an explanation or list. This disrupts the flow of the sentence.

hydrogen, 2.9 times as great,

Choice C is incorrect because it lacks punctuation after "hydrogen."

hydrogen 2.9 times as great,

Choice D is correct because it uses proper punctuation to separate the introductory clause from the numerical comparison that follows, adhering to the conventions of Standard English.

hydrogen, 2.9 times as great;

Correct sentence

The text with the most logical and precise phrase - hydrogen, 2.9 times as great;

Option

D

Can you summarize what you’ve understood in the above steps?