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: A child plays with a vacuum attachment piece in a bedroom. The mother vacuums the floor of the bedroom. the child <sep> (A) kneels on the floor and vacuums the carpet of the butt. (B) brings the vacuum attachment into the next bedroom. (C) removes the vacuum from the bedroom. (D) uses the vacuum attachment piece to vacuums the floor.
Output:
B