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: Tools sit on a table and we see a person unpack a bike and assemble it. We see the man put a tire on the bike. a person <sep> (A) is applying a coat of plaster on the bike. (B) turns it on and puts a catch into it. (C) tightens the holds on the handlebars. (D) takes the tarp off the bike.
A:
C