单项选择题
A．Germany B．Italy C．the U.S.A. D．China
A．is a large sum of money B．is a small sum of money C．is important in a computer system D．can buy a computer at that time
A．was a sign that someone had broken into Stoll' s system B．would cause serious health problems C．would make Stoll a very rich man D．was found out by a Berkeley student