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 is sitting on a horse holding a rope. A calf is released from a pen and he chases after it. the man <sep> (A) gets off and ties the horses legs together. (B) jumps off his horse and ties the legs of the calf. (C) mounts the horse, and he begins to chase after the calf. (D) ropes the calf again and sets it down while it runs away.
A:
B