Which of the following best expresses the central idea of the text?
A. The terrorist attacks on 9/11 inspired a new generation of Americans to fight for their
country.
B. The report about the attacks on 9/11 revealed that the United States was not prepared
to defend itself against an attack from the air.
C. The attacks on 9/11 led to the United States' war on terror, which significantly changed
American society.
D. The war on terrorism was a success because Osama bin Laden was killed in a raid by
Navy SEALs in May 2011.
