Which sentence contains a dependent clause?
A. Would you like to see the Washington Monument or the White House?
B. For spring break, my family will visit Washington, D.C., which is the capital of the United States.
C. The cherry blossom trees in Washington, D.C. are beautiful, so people like to have picnics in the park.
D. The Lincoln Memorial was built in 1922, and it’s one of the most popular monuments in Washington, D.C.