C. I took this test before. Don't sweat it! As long as you read, and maybe have the book with you to help! I hope you do great!
The new sentence, Lion cubs are born with spots, but they lose their spots by the third month, is an example of a COMPOUND VERB.
Compound verb are verbs used in a sentence by a single subject.
The subject in the sentence is LION CUBS.
The compound verbs in the sentence are ARE BORN and LOSE.
The answer is (C).
In (A), there should be a comma before “Billy”.
In (B), there shouldn’t be a comma before “for”.
For (D), there should be a comma after “well”.
So, the answer is (C).