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 wear a sport coat [title] Learn the difference between a sport coat and other coats. [step] Though they're commonly conflated, a sport coat is not a blazer or a suit jacket. Sport coats need not match the fabric of the pants, as you'd find with a suit jacket. <sep> (A) The sport coat should also wear dark wash jeans and a tie. [substeps] Sports coats especially stick out in the summer and stay in place at night during the day. (B) Instead, they have a specific pattern or color used in place. Once you find a sport coat, stay in mind that it needs to be closely tailored. (C) In fact, many sport coats are used to cover up " casual " or something too formal, like a suit or slacks. Sport coats typically go below the knee or above. (D) The biggest difference between a sport coat and a blazer is that sport coats are patterned, while blazers are made of solid fabric with a contrasting color of button. [substeps] Stylistically, sport coats are sometimes a slightly looser fit than other kinds of dress coats, allowing for outdoorsy use and " sporting.
D

[header] How to exercise to prevent blood clots [title] Get up and move around. [step] Whether you're traveling by train, plane, or automobile, long-distance travel involves a lot of sitting. When you sit, you decrease circulation in your legs-especially if you sit with your legs crossed or with one foot under you. <sep> (A) If you are on a train or coach, the seat underneath you always feels flat, as if you are sitting. While there are good ways to stretch out your legs, there is not a lot a group of people can do. (B) This will help promote blood circulation to your feet. It will also keep you from rubbing your legs in an annoying manner-you can't promote blood flow when you're sitting on one leg. (C) [substeps] You can exercise while you drive or driving, although getting up and down on the exercise train can significantly improve circulation. You can also listen to music while you exercise, which will also help to prevent blood clots. (D) [substeps] If you're on a plane, try to get an aisle seat so you can get up and move around more easily. Ideally, you want to get up and stretch your legs or walk up and down the aisle once every hour or so.
D

They are swaying their hands above their heads from left to right. Then the instructor demonstrates arm strength by tapping his right arm over his extended left arm. both the instructors <sep> (A) demonstrate arm movements attempting to instil a physical strength into their body. (B) stand facing each other as they demonstrate slow and gradual hand movements. (C) take turns demonstrating arm strength movements at the same time. (D) defecate profusely while trying to get up.
B