Detailed 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".
Q: They continue playing croquet as they take turns to hit the balls one by one with the mallets. one of the teens <sep> (A) stumbles over a stick. (B) hits a stick on the ground to signal a certain time as he continues to hit the balls. (C) rolls over on the ground. (D) then just drops his mallet down while the two other teens give each other high fives.
A:
D