You will be given a definition of a task first, then some input of the task.
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".

A brush is attached to a power drill for scrubbing. The top of the sink is scrubbed then the bowl. it <sep> (A) is then affirmed that it is proper to scrub. (B) is then rinsed, then wrung out. (C) is wiped with a towel to finish. (D) is cleaned with an alcohol solution and various cleaners are used.
Output:
C