Which of the following was a cause of the September 11 terror attacks by al-Qaeda?(1 point)%0D%0AResponses%0D%0A%0D%0AIraq invaded Iran.%0D%0AIraq invaded Iran.%0D%0A%0D%0AThe U.S. sold missiles to Iran to free hostages in Lebanon.%0D%0AThe U.S. sold missiles to Iran to free hostages in Lebanon.%0D%0A%0D%0AIranians seized American hostages in 1979.%0D%0AIranians seized American hostages in 1979.%0D%0A%0D%0AThe U.S. maintained troops in Saudi Arabia after the invasion of Kuwait.%0D%0AThe U.S. maintained troops in Saudi Arabia after the invasion of Kuwait.

The U.S. maintained troops in Saudi Arabia after the invasion of Kuwait.