Detailed Instructions: 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".
Q: A man is seen speaking to the camera while holding a knife in his hands and begins sharpening the knife along a board. the man <sep> (A) continues sharpening the blade and then uses other boards to sharpen the knife. (B) continues cutting dips into the knife along the board and showing off the knife fully. (C) continues to polish and sharpen the knife while further sharpening his small knife. (D) then adjusts a tool and flips the board up and approaches a vat.
A:
A