Definition: 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".
Input: Two boys are sitting on bleachers and talking. They explain how to keep shoes clean, by displaying a toothbrush and several spray cans. they <sep> (A) scrub their shoes, then polish them off. (B) use soap, rubbing it all over their feet and shoes to do it. (C) make a sand castle in the sand and decorate it with flowers and birds. (D) are also being racquetball then posing with the gloves.
Output:
A