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 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.
[A]: D


[Q]: [header] How to start a nanny business [title] Get a list of prospective nannies. [step] Advertise in newspapers, online ads, put signs up, and give flyers. If you have experience in child care, solicit coworkers and contacts to see if they are interested in providing nanny service or if they know others who would. <sep> (A) Online groups like the sunshine and children's network are great places to begin looking. Be sure to approach your current employer, perhaps to ask if they know of a nanny who would be willing to offer you a job. (B) Also keep in mind if someone does not want a flyer they are not interested so don't bug them they might spread the word, ruining your business. [title] Do a thorough background check on each candidate. (C) [substeps] Make sure to get a roster in question. Nanny cannot become a nanny, but a general guideline for a daycare provider's operations is to have several nanny's staff. (D) Maybe advertise with a school newspaper or with individual business cards. If the nanny is from a more prestigious family, contact them later so they can accept your offer.
[A]: B


[Q]: [header] How to accessorize a red dress [title] Mix in different shades of red. [step] Bright red shades can look overwhelming if used in every accessory. Instead, use different shades of red to create contrast while staying within an all-red color scheme. <sep> (A) If you work in a large area, such as a large department store or an office, consider mixing up or contrasting a less-than-bright red shade. Red can be difficult to convey visually, and in some regions it can only be painted like red. (B) You have a lot of options with red, starting on the lighter end spectrum with pinks and light reds, and ranging all the way into super dark shades like wine and burgundy. [substeps] For instance, you could wear a scarf, shrug or wrap in a shade of red that's slightly lighter or darker than your dress. (C) Both bold and bold red shades represent the outfit. However, for added anticling and bright reds, try wearing a light-colored dress with a deep-red lipstick in a deep-red ensemble. (D) Try out various shades of red to keep a neutral look. [substeps] In particular, try to choose colors like green and deep reds.
[A]:
B