Question

In which one of the following sentences is the apostrophe used correctly?

A. The train began it's journey across country.
B. I put the letter back into it's file.
C. It's up to you to decide what to do.
D. The cat licked it's paws while the dog watched.

Answer 1

I would say c it would be

Answer 2

The answer is C, because "it's" is "it is", so it would make sense if you said, "it is up to you to decide what to do"