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 man is pushing a lawn mower through the grass. A child is standing next to him pushing a toy lawn mower. they <sep> (A) speed past a car in the street. (B) pass other kids on the lawn mower. (C) move up and down the lawn on the mower. (D) give each other a high five.
Output:
D