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 wearing a yellow shirt and eye and ear protection mows his yard with a sit down lawn mower. the man wearing a yellow shirt <sep> (A) and ear protection mows his lawn with the sitting. (B) and ear protection mows his yard bending at the knees. (C) goes back and forth the length of the yard in a straight line. (D) mows the yard holding a large black and white dog in his hand.
C