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".

Ex Input:
[header] How to avoid the stomach flu [title] Wash your hands often. [step] Wash your hands carefully with soap and water for at least 20 seconds. Always wash your hands after going to the washroom and before and after handling food and eating. <sep> (A) Washing your hands is important, since if the way you handle and eat is bad (germs, bacteria, etc. ), your best chance at preventing the flu is by keeping your hands clean. (B) Don't attempt to dry or clean your hands on something other than a business table. [title] Wear long pants (not utility pants to wear running shoes with). (C) [substeps] It's a good idea to wash your hands between-and as many times as you go to the bathroom. This will help prevent an episode of nausea in the future, as well as allow your body time to shut down its internal defenses to fight off food, germs, and viruses. (D) This will help to prevent the spread of germs. Germs on your hands can get into your eyes, ears, and nose and make you sick.

Ex Output:
D

Ex Input:
A man in yellow glasses takes a drink out of a water bottle. People are running across a finish line of a race. someone <sep> (A) falls back on the sand and gets trampled. (B) puts a medal around another person's neck. (C) crashes into the backstretch lane. (D) holds up crumpled sticky things.

Ex Output:
B

Ex Input:
A female swimmer is standing on a diving board in a black swim suit and she jumps off doing multiple flips. She is then shown on ground level talking and wiping her face with a towel. all <sep> (A) of which leads into a shot of her swinging over the side and lands with two different people on the side as well as others. (B) of a sudden she begins turning around in the water and diving backwards, pointing completely losing her balance a bit. (C) the girls continue talking to one another and splash each other with an orange towel. (D) of a sudden, she returns back to the diving board and does a crazy flip where her knees are tucked in and she's doing several flips and then men applaud her and there's an instant replay.

Ex Output:
D