Answer to 1) is c) Philadelphia. Even though several U.S. cities briefly hosted the new country's Congress during the Revolutionary War, Philadelphia was the place where the Declaration of Independence was signed, and it's the city where Congress was in session when the Articles of Confederation were enacted in 1781.
How did you do? Here's a tougher question:
2) About how many people lived in Philadelphia in 1776?
a) 250,000
b) 5,000
c) 30,000
d) 100,000
