Multiple choice

___appears considerably larger at the horizon tan it does overhead is mereky an optical illusi.

  1. The Moon

  2. When the Moon

  3. That the Mooon

  4. The Moon which
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The sentence requires a noun clause to act as the subject for the main verb "is". The conjunction "That" introduces a noun clause ("That the Moon appears..."), making the entire clause the subject of the sentence. Choosing "The Moon" on its own would leave the verb "is" without a proper syntactic connection, creating a run-on structure.

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