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 Q]: [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.
[EX A]: B

[EX Q]: [header] How to effectively use email at work [title] Allocate specific times of the day to read and respond to your e-mail. [step] If you don't stay in control of checking your e-mail, you may end up wasting too much of your work day checking it. Try to respond to emails immediately. <sep> (A) While you can use your email system to get more emails, remember to adjust your work email usage to accommodate any change in time. [substeps] Use social media to check your e-mail and read your e-mail. (B) [title] Organize your email whenever you are in it. [step] Effective use of work email includes deleting emails you know you won't need as you read them and filing those that you will need in specified folders. (C) Staying in control of your personal email should be your top defense when handling an in-office correspondence. [title] Identify your e-mail's subject line. (D) Or try to set an automatic schedule to read them at other times. [substeps] Plan to read at least once a day, unless you work on a busy schedule.
[EX A]: B

[EX Q]: [header] How to train to fence at home [title] Position your feet for stability. [step] Your feet should be positioned approximately should length apart. Your body should not be facing directly toward the opponent, but rather to the side. <sep> (A) The point of your foot will be directly in front of you. [substeps] Leg blocks are good for increased stability. (B) The front foot should be positioned forward, facing directly toward your opponent. The back food however, should be perpendicular to the front foot, facing in the same direction as your body. (C) [title] Reach to the front of the corner post to use a side bar. [step] You need to be close enough so that you can jump the corners without difficulty. (D) The exact position of your feet is the first indicator you need to coordinate your foot placement with your stance when facing your opponent. [substeps] Spread your feet to almost three-quarters of the length of your opponent's front.
[EX A]:
B