What event led to the United States bombing Afghanistan on October 7, 2001?

Question

Responses
A The Soviet invasion of AfghanistanThe Soviet invasion of Afghanistan
B Taking of American hostages in TehranTaking of American hostages in Tehran
C Attacks on the World Trade Center and the PentagonAttacks on the World Trade Center and the Pentagon
D Ronald Reagan telling Gorbachev "Tear down this wall!"

Answer 1

C Attacks on the World Trade Center and the Pentagon