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 sits down by the sidewalk playing a guitar. A black man approaches to watch the guitarist perform. a woman <sep> (A) approaches to sing with them and they begin to have a conversation. (B) stands by recording the performer. (C) comes holding a guitar made out of materials. (D) at various functions watches on as the guitarist plays.

Ex Output:
B


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:
[header] How to choose an intellectual property lawyer [title] Identify your type of intellectual property. [step] There are several types. Although some lawyers will handle legal issues involving all types, some lawyer will specialize in one or two. <sep> (A) [substeps] The strength of your intellectual property law may influence the clientele. For example, a powerful attorney might be willing to resolve a complex dispute with your potential client. (B) You should identify which type of intellectual property you have : [substeps] Patents. Patents are granted by the federal government and confer the right to make, use, sell, or import a product exclusively for a limited amount of time. (C) [substeps] Each type forms a phrase with an emphasis on one or another. You often ask prospective lawyers what type of intellectual property they will represent you. (D) These may include : [substeps] Intellectual property intellectual property legal liability intellectual property [title] Search online for a lawyer specializing in intellectual property. [step] Both are free and easy to find.

Ex Output:

B