Which of the following sentences expresses the main idea of the article?%0D%0A*%0D%0A1 point%0D%0AIt is important to remember the attacks on September 11, 2001, and to commemorate those lost.%0D%0ABefore the attacks on September 11, 2001, the Twin Towers kept watch over lower Manhattan.%0D%0AFollowing the attacks on September 11, 2001, the Twin Towers buckled from the heat.%0D%0AAfter the destruction from the September 11, 2001, attacks, panic has given way to peace.
