The Brakes on Dirk's Tour De Valle Bicycle Malfunction, but He

The brakes on Dirk's Tour de Valle bicycle malfunction, but he continues to ride it because he likes the thrill of the unstoppable acceleration. One night, enjoying a fast downhill pace, he speeds through a stop sign and is struck by a truck. In Dirk's suit against Tour de Valle, the bike maker can raise the defense of

A) commonly known dangers.
B) assumption of risk.
C) product misuse.