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 seen shooting a bow and arrow followed by another man taking a bow and aiming. Another man is seen kneeling down before bows and speaking to the camera. he <sep> (A) clips a man on the arm and leads into a shirtless man releasing a arrow. (B) speaks more and pictures of him hitting the arrow in the bow while another draws closer with arrows. (C) points to various boxes and continues looking into the camera and speaking. (D) then approaches another man and starts shooting arrows down him.

Ex Output:
C


Ex Input:
The man is hunched over on the the ground trying to build a fire by himself. It's all about adding oxygen at the right time once you have started a nice fire. also <sep> (A) , the cameraman goes to stand up to help the guy who's in the crouch position as the camera guy films them and makes notes. (B) , the guy rushes to get a bigger one. (C) , the man is not lying flat on the ground as he is trying to put firewood into the fire on the ground. (D) , if the fire is dead or dying you just hit it with a little bit more oxygen and it will help bring it back up.

Ex Output:
D


Ex Input:
[header] How to clean vomit from a mattress [title] Scrape the vomit off the bed. [step] The first step is cleaning the mattress is removing the vomit from the surface of the bed. Use a paper plate to scrape any solids off the bed, and place it in a plastic bag to discard in the trash. <sep> (A) [substeps] Before cleaning up the vomit, it's a good idea to put on rubber gloves. That will protect you from any germs. (B) Most people may choose not to use a paper plate, as it won't remove the vomit as quickly. [substeps] Alternatively, you can use a rubber spatula instead of a paper plate. (C) [substeps] Another way to remove the vomit is to place a paper plate over the area where the vomit was. This will catch any solids that have collected. (D) [substeps] If the vomit did not come from any solid bedding, use a paper plate and clean the whole mattress with it. [title] Use a bucket to pour out the vomit.

Ex Output:

A