D. All the above would be correct for the question.
The options to your Question are:
a) Saturday Night Massacre
b) Executive Privilege Firings
c) Nixon Cover-Up
d) Watergate Scandal
The correct answer is Option a. Saturday Night Massacre refers to President Nixon's order to fire several of his staff members who refused to follow his orders. The exact origin of this phrase could not be tracked but it first appeared in an Article of Washington Post two days following the event and the author of that article stated in the article that the event was already being termed as Saturday Night Massacre.
The correct answer for this question would be the POPULATION. The states would dispute each other claims to western territories because of population. It is the key factor for this dispute because it means control in a democracy. Hope this is the answer that you are looking for.