What makes this passage an example of expository prose?

The most you could say about feelings and emotions is the surprise the author finds in the fact that the element that is most abundant in the universe is also the simplest one in its makeup. A is not right.

B: lots of writing has this characteristic. I don't think you are intended to pick this answer.

C: I think its actually pretty specific.

D: It doesn't use run ons for sure.

I've eliminated everything. Not a good question. I suppose the best choice is C, although I think it gives good details.

d bc i just guessed