The correct verbs that agree with the subject "everyone" are:
- is
- agrees
(Note: "is" is the first correct response in your options, but "agrees" is not included in the options. The provided options also include "agree," which does not agree with "everyone.")
So, based on the options you provided, the only correct answer is:
- is
If you're looking for context, "everyone" is a singular pronoun, so it takes singular verbs like "is." "Were," "agree," and "think" do not agree with the subject "everyone."