A. New York
B. Boston
C. Washington, D.C.
D. Philadelphia

Detailed Explanation:

The Declaration of Independence was adopted in Philadelphia, Pennsylvania, making it one of the most significant historic cities in the United States.

Important Exam Facts

• Historic City: Philadelphia
• State: Pennsylvania
• Year: 1776

Related Questions & Quick Answers

• Which state is Philadelphia in? — Pennsylvania.
• What famous building is there? — Independence Hall.
• Why is Philadelphia important? — Birthplace of US independence.