Answer:
A: It is what our government is based upon.
Explanation:
Basically, we can eliminate B since the Constitution is just within the US. C doesn't make sense becuase the Constitution has been amended multiple times, and D does not work becuase the Constitution does not mention political parties.
The answer is A becuase the Constitution outlines the foundation and basis of America including core values & base-level ideologies/laws.
The answer would be C.
The Compromise of 1877, settled the intensely disputed 1876 presidential election. It resulted in the United States federal government pulling the last troops out of the South, and formally ending the Reconstruction Era.
All of these presidents were in office during a war.