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 black screen appears and the yellow words appear on them read "extreme how-to presents". The second black screen has yellow words that read "installing heated floor tile". a man <sep> (A) is now standing and talking in the corner of a residential home, dressed in a long sleeved button up black shirt, brown long pants, shoes and wearing a hat. (B) is installing the hardwood floors. (C) starts sweeping the floor in a position and putting gel between the tiles. (D) is shown attempting to installation tile in various rooms, including the top floor.

Ex Output:
A


Ex Input:
A large group of people are seen moving around on exercise bikes. the group <sep> (A) kicks around one another while others watch on the side. (B) move together while the camera pans around. (C) moves around the road and jumps on and off the exercise bikes. (D) rides around, bumping into one another.

Ex Output:
B


Ex Input:
On a river outside the boys are walking down the street as cars pass by. there <sep> (A) are many large waves the kids are in as a small child look to the sky to see if they are being lifted by a whale or a hurricane. (B) are children riding tubes and they pass another river before the turn. (C) are many people out doing many different activities on the water. (D) is also a river on the side of the road and it gently bathing the back of a man's head.

Ex Output:

C