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: A telescopic view of multiple people dressed in biking gear is shown. The crowd spreads out, walking around with guns in hand. they <sep> (A) ride down a ramp, then get off when they reach the bottom. (B) start riding around in front of each other. (C) go from one set of parked vehicles to other and show different biking courses. (D) aim at various objects.
Output:
D