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 seen talking with a camera very close to his face. another man with a helmet on <sep> (A) ones sitting on an exercise bike walks in and seems to be talking without a helmet. (B) approaches and the man bounces a tennis ball against the arm of another man. (C) is standing near by. (D) tries to solve a rubik cube.
A:
C