56（）

A．most computer criminals who are caught blame their bad luck
B．the rapid increase of computer crimes is a troublesome problem
C．most computer criminals are smart enough to cover up their crimes
D．many more computer crimes go undetected that arc discovered

A．moves in a quick but steady way year after year
B．sends out less and less heat and light with each passing year
C．radiates the same amount of light every year
D．might have a strong influence on the weather patterns