Reading Comprehension (RC) | Re: A vigorous debate in astronomy centers on an epoch in planetary histor

[textarea] 1. Which one of the following most accurately expresses the main point of thepassage?

Explanation

Roadmap:

Para1: Moon mission found ev of LHB causing craters on Moon. Should have affected Earth as well asMoon.

Para2: 3 theories re: cause and extent ofLHB

Para3: New ev (rock from Mars found on Earth) supports LHB affected inner solar system. Need more ev to confirm.

Our roadmap of Paragraph3 sets out the author’s main idea quite nicely: new evidence supports
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