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: [header] How to relieve constipation after surgery [title] Use a stool softener. [step] One of the first medications to try if you're feeling constipated is a stool softener. These are easy to find over-the-counter and can help get you back on track. <sep> (A) [substeps] The way that stool softeners work is that they draw water into your stool from your intestines. This makes your stool softer and easier to pass. (B) [title] Take 600ml of stool softener before a meal. [step] Most stool softeners kill the production of prostaglandins. (C) [substeps] One good option for relieving constipation at the time of surgery is a stool softener. While stool softeners do provide temporary relief from constipation, they are expensive and will often disappoint you. (D) These medications are named for their antioxidant properties, which help reduce diarrhea and keep your stools from becoming irritated. [substeps] Remember that: the next time you're using an over the counter stool softener treatment, be sure to follow the dosing instructions.

A: A
****
Q: Two men are inside a gym together. They are engaged in a game of table tennis. they <sep> (A) kick the tennis ball back and forth against the wall. (B) hit the ball back and forth over the net. (C) crash into each other and then continue to play the game. (D) punch and kick at each other as they play.

A: B
****
Q: [header] How to protect your village in clash of clans [title] Build walls effectively. [step] The first aspect to a great defense base in clash of clans using all of your walls, and using the walls effectively. At lower levels you won't have a lot of wall to build so you want to put your most valuable resources inside your walls. <sep> (A) [substeps] When building walls, avoid building wall walls because they can be heavy and will only create more loot for you. To defend yourself, build walls by using screens, floors, and mobs. (B) Troops with enough time will also help and prevent the enemy from using walls like apple, cabbage, and rice place to dig and dig for food and water. [title] Seek out completely different crafting structures. (C) [substeps] At the beginning of your village your three biggest resources are your elixir and gold storages, and your town hall. For defense minded players, the town hall is your most valued asset. (D) [substeps] Two strongest or strongest will be defense and defense. Each wall should have one higher or lower building.

A:
C
****