-
A
A list of US Presidents
-
B
The highest law of the United States
-
C
The national anthem
-
D
A book about US history
Why this is the answer
According to this sentence, the Constitution is the HIGHEST LAW OF THE UNITED STATES. All other laws must agree with the Constitution — if a law contradicts the Constitution, the Supreme Court can declare it unconstitutional and invalid. The Constitution was written in 1787 in Philadelphia. It establishes the three branches of government and protects the rights of the people. The Preamble begins with 'We the People' — the foundation of US democracy.
Source: USCIS Citizenship Reading Test — Constitution