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".

A man demonstrates how to clean a tile floor with bleach, a bucket and a mop. a man <sep> (A) talks to a camera while holding a mop before the screen cuts away to 6 videos of him progressively mopping a floor. (B) measures the floor with a mop. (C) is wiping plaster on the floor in front of the camera. (D) demonstrates how to clean an iron.
A