Definition: 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: Men are walking to a bike shop and talks with the man inside. they <sep> (A) get mixed in with the machine and are making bolts and chains. (B) get on the bike, and the man conversation with the bike dealer. (C) then walk past a car. (D) are assembling different pieces of the bike.
Output:
D