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".

Then she turns the vacuum cleaner on and begins vacuuming the bedroom floor. The boy watches his mom vacuum as he jumps on the bed. the boy <sep> (A) takes two steps then turns the vacuum on full strength to see what she is doing. (B) then lays down on the bed as he sees his mother finish the job. (C) then jumps off and begins playing rock paper scissors or something taller. (D) walks to a copy machine to turn it on, turns the dial to turn off, and returns to vacuuming.
Output:
B