What Triggered the Watergate Scandal That Began in 1972

What triggered the Watergate scandal that began in 1972?

A) An accident involving a U.S.senator who drove his car into the Potomac River
B) The discovery that Nixon campaign workers had broken into and bugged Democratic party headquarters in Washington,D.C.
C) Reports that Democratic party aides had stolen campaign strategy information from Republican party headquarters in Washington,D.C.
D) A newspaper report that Republican government officials had been collecting campaign funds from lobbyists