Question

Which sentence contains no errors in the use of apostrophes?

A.
Have they heard anything about they're lost dog?

B.
I thought those books were there's.

C.
When you're finished playing the game, put it away.

D.
Don't put the dog's food in it's bowl yet.

Answer 1

C, is the only one that does not have grammar errors 
a is the wrong their same for b