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:
[header] How to install a bakflip hd tonneau cover on a ford f150 [title] Place the rail of the bakflip hd on right hand side bed rail of the f150. [step] Slide the tonneau rail all the way forward to the bulk head. It is a good idea to have a squeeze clamp or similar to hold it in place. <sep> (A) [title] Slowly turn the bakflip over so it moves slowly, its going to wobble and have to be bent the opposite way of the rail. [step] Be prepared for a lot of bumping. (B) [title] Tightly wrap round tray socket on right hand rail over cover and fasten. [step] Compression disks complete a swivel mounted over rail. (C) [title] Place the included rail clamps in place. [step] Tighten with a wrench or socket. (D) This will prevent the oil from jumping up and down accidentally while the g2 is being painted. [title] Place the nikon bolt assembly inside the couplers cradle.

Ex Output:
C


Ex Input:
Man is interviewing some people who is watching two women in bikini wrestling, the woman wins and start jumping. two women in bikini <sep> (A) are standing with a dwarf and he is winning the fight while the interviewer is talking to people in the audience. (B) threw down the metal bar and continue wrestling, of course some people are standing in the pool watching them. (C) wrestle second style in the track and field and win and walk to finish the event. (D) are returning to training with trampoline sits on a beach.

Ex Output:
A


Ex Input:
A young boy is sitting outdoors on a wooden bench and drumming on a drum set that is made out of steel plates, cans and pots. a man <sep> (A) just walked past him while the boy was drumming loudly. (B) stands over him listening to him play. (C) walks down the sidewalk behind the boy. (D) is sweeping next to him while he plays the drums.

Ex Output:

A