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".

The people put a bike on a rack. We see the people putting the bike together. The boy puts the handlebar on. we <sep> (A) see a man put on the back tire. (B) see the names of the bikes. (C) see the ending title screen. (D) see the ending screen.
Output:
A