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".

[header] How to prevent flip flops from hurting your feet [title] Wear them for short activities. [step] You can wear your flip flops for quick trips to the store, or to pick up your mail, and if you're meeting friends for a meal. As long as you won't be on your feet for a long time or doing something that risks injury, wearing flip flops is fine. <sep> (A) [title] Train your feet where you can slip, so that you don't end up with your wrist hurting. [step] Most people would assume someone else's wrist will be sore for an extended period of time. (B) [substeps] If you can hold them while leaving, try holding them while you're going to the store, too. Also, you can wear the flip flops while holding a book. (C) [title] Wear them to the beach or the pool. [step] Flip flops were really designed as a convenient and easy-to-wear shoe that you can take to the beach or the pool. (D) You just have to sit in them long enough to be comfortable. [title] Don't hesitate to take them off.
Output:
C