In this task, you are given a context and four options. Each option is a suggested ending for the context. You should read the context and pick the best ending for the context. Please answer with "A", "B", "C", and "D". 
Q: A man and a dog walk onto a field. A man throws a frisbee and the dog chases after it. the dog <sep> (A) brings the frisbee back to the man. (B) catches and then runs away. (C) catches the frisbee and runs to fetch. (D) gets the frisbee and chases after the man.
A: 
A