根据下面短文回答下列问题。 Big Ben is not only a name of a man. It is also the name of a big clock in London. London is the capital of England. This clock has four faces. So, no matter where you stand, you can read the time on the face of Big Ben. Each face is the size of a bus. The hands are about four meters long. If you go to London, you may want to visit the House of Parliament. You will probably hear it and see it. The big clock makes such a loud noise. "Dingdong, dingdong." It goes every quarter of an hour. The name of Big Ben comes from a great builder. This man did much building work in London many years ago. You can read the time of Big Ben ______.

A. at the top of the clock
B. in the House of Parliament
C. on the four faces of the clock