The Economist is one of the most important ______ in Britain.

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

A．it is still impossible to detect computer crimes today
B．1 computer crimes are the most serious problem in the operation of financial institutions
C．computer criminals can escape punishment because they can't be detected
D．people commit computer crimes at the request of their company