TASK DEFINITION: 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".
PROBLEM: People are standing in a swimming pool. they <sep> (A) are playing a game of water polo. (B) put on protective caps to ward off the cold. (C) dip a sponge into the water. (D) push themselves through a hole in the water.

SOLUTION: A

PROBLEM: [header] How to fist bump [title] Ball your hand up into a fist. [step] Press the tips of your fingers into your palm so that your hand makes a fist. This will be the position that you keep your hand in for the bump. <sep> (A) Hold the fist up high enough to extend your palm to one side. Bend your wrist so that both fingers are pointing out, with the whites of your knuckles showing. (B) [title] Put your fist out in front of you. [step] Place your fist in front of your body with your knuckles facing up. (C) Make sure your palm looks nice and flat. Ideally, this hand should be neither thicker nor thinner than your fist. (D) [substeps] Whether you're with friends or with an opponent, the fist looks like a punching bag in a gym. The knuckles, the tips, and thumb look like a regular ring finger.

SOLUTION: B

PROBLEM: [header] How to use a travel pillow [title] Try your neck pillow before buying it. [step] Neck pillows don't typically come in different sizes, so the only way to know if it will fit comfortably is to try it on. If possible, put your neck pillow on before you buy it, or keep the receipt and try it on before your trip. <sep> (A) [substeps] If you can't find your neck pillow online, contact the nearest travel store. Remember to wear a face mask to protect your neck body from respiratory and heart disease. (B) Here's how to write your partner's name on your neck pillow : [substeps] If the pillow you're sleeping on doesn't fit your neck pillow correctly, you can simply write down the name first. [title] Pick a traditional line or pattern to write in. (C) You should be able to rest your head on it without bending your neck uncomfortably, and the material shouldn't pinch or chafe on your neck. [title] Inflate your pillow if necessary. (D) [title] Buy a pillow with a stock head. [step] If you plan to travel with the stuffed stuffed topic on your pillow, opt for a head that can fit into the pillow.

SOLUTION:
C