Which of the Following Statements Is True of the Terror

Which of the following statements is true of the terror attacks of 9/11?

A) Americans were forced to change their views of national security.
B) One of the major challenges for U.S.foreign and national security policy became how best to respond to an attack on the United States by China.
C) Americans found that the attacks on the World Trade Center had been planned and carried out by a terrorist network called al Qaeda.
D) Americans still knew that regional conflicts in other parts of the world had no direct impact on the United States.
E) Americans were forced to change their views of national security, and Americans found that the attacks on the World Trade Center had been planned and carried out by a terrorist network called al Qaeda.