Question

Which sentence contains an error?

I've been stuck on this question for a while now, and I'm not really sure what the answer is. Instead of just providing an answer, if you could explain the reasoning, that would be a lot more helpful. Thank you

a. Ten months seem like a lifetime when you're young, but not when you're older.
b. Twenty-five days is a long time at sea.
c. The Sun Also Rises is one of my favorite books. ('The Sun Also Rises' is in italics.)
d. all of the above.