Why was the scandal that led to President Nixon's resignation called "Watergate"?

a. "Watergate" was the code word used by the people involved in the burglary.

b. It was the name of the building where significant events took place

c. The Watergate Pipe and Valve Corporation made huge contributions to Nixon's 1972
campaign

d. It was the name of the bank where the participants in the scandal kept their money.