Final answer:
The crucial aspect of the Watergate scandal not explicitly addressed by the Constitution is A. Executive privilege. Although recognized since the early days of the presidency, the Constitution does not detail this power, which became a central issue during the Watergate scandal.
Step-by-step explanation:
The crucial aspect of the Watergate scandal, investigation, and court cases that was not explicitly addressed by the Constitution is A. Executive privilege.
Executive privilege, while a recognized presidential power since George Washington's administration, is not detailed in the Constitution. During Watergate, President Nixon attempted to use executive privilege to withhold the Oval Office tapes, which ultimately led to significant legal battles and his resignation. Presidential impeachment and the potential for disqualification from holding office are constitutional provisions. However, the Constitution doesn't explicitly discuss criminal prosecution after impeachment, but this area was not as directly at issue in Watergate as the assertion of executive privilege.