Q: 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".
On a giant dome of dirt there are many bikers at the top and a very big crowd watching. they <sep> (A) start to take off into the air doing flips and really cool professional tricks. (B) begin peddling their bikes as they do a scissor' sh' on the dirt as a sign of victory. (C) compete at full speed to get over the rudders and have some fun. (D) race and kick the sand trying to get it into people circle like corners to go after a beetle.
A:
A