A restrictive adjective clause is not set off with commas. The correct answer would be the first option. Restrictive clause is a clause that cannot be omitted in the sentence for it will change the idea of the whole sentence. It is the opposite of non-restrictive clause--a clause that serves as an additional information that is set off with commas.
The answer to your question is A:explanation
Answer:
A. Facts and opinions
Explanation:
When someone is comparing two things its important to know what is a fact or not so that opinions do not wrongfully sway you.