Final answer:
On June 17, 1972, five members of CREEP broke into the Democratic headquarters at the Watergate complex.
Step-by-step explanation:
On June 17, 1972, option A occurred in Washington, D.C. Five members of CREEP (Committee to Re-elect the President) broke into the Democratic headquarters at the Watergate complex. This event, known as the Watergate scandal, ultimately led to the resignation of President Richard Nixon.
Learn more about Watergate scandal