Detailed Instructions: 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".
Problem:A person is using a mop to mop the floor. A small dog is chasing the mop. they <sep> (A) continue to mop with the dog on the mop. (B) are mopping the back of a writing desk, wall and the floor. (C) jab the mop into a bucket. (D) dance around on the screen.
Solution:
A