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 person walks up to a vacuum cleaner and picks up the wand. The person vacuums a carpet in the hallway of a home. the person <sep> (A) vacuums the staircase behind a kitchen sink. (B) turns off the vacuum then replaces the attachment with a larger one for carpets. (C) puts on a welding helmet. (D) vacuums wallpaper on the floor.
Output:
B