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". 
Input: The boy hands the tooth brush to someone. The boy dances his feet on a wood floor. toothpaste <sep> (A) is taken from a bottle and collected outside. (B) is applied to the toothbrush and handed to the boy. (C) splashes his hand. (D) is brushed in a bowl.
Output:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
B