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 Input:
A man is pushing a lawn mower through the grass. A child is standing next to him pushing a toy lawn mower. they <sep> (A) speed past a car in the street. (B) pass other kids on the lawn mower. (C) move up and down the lawn on the mower. (D) give each other a high five.

Ex Output:
D


Ex Input:
[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.

Ex Output:
D


Ex Input:
A person's hand is seen throwing several darts onto a board on the other side of the room. the camera <sep> (A) then pans around to show a man finished and dressed in another one on the far left side of the room. (B) pans to various objects around the table a someone is using as a dartline and the person tying a blindfold behind their hands. (C) pans out to a group of women sitting together in other rooms. (D) then moves closer to the board and zooms in on the location of where the darts are thrown.

Ex Output:

D


