The Following Questions Refer to the Excerpt Below

The following questions refer to the excerpt below.
"In his conduct of the office of President of the United States,Richard M.Nixon,in violation of his constitutional oath faithfully to execute the office of President of the United States…has prevented,obstructed,and impeded the administration of justice,in that:
Richard M.Nixon,using the powers of his high office,engaged personally and through his subordinates and agents,in a course of conduct or plan designed to delay,impede,and obstruct the investigation [into the Watergate break in]… to cover up,conceal,and protect those responsible;and to conceal the existence and scope of other unlawful covert activities."
Articles of Impeachment,U.S.House Judiciary Committee,1974
-Chief among the political concerns of this time period was the

A) rise of informality in U.S. political culture.
B) proper balance in the powers of the presidency and the federal government.
C) supremacy of state sovereignty over local issues.
D) growth of "big government" and the national debt.