I think it's D, the others either don't have enough punctuation or they have too much
Answer:
It was a normal day, all of a sudden people at the airport were getting radioed that planes were highjacked. A few hours later in New York, a plane crashed in to one of the twin towers, another one followed hitting the other tower. A third plane came crashing in destroying the 23rd to 14th floor. The pentagon: a plane came crashing in destroying part of the pentagon. Back at the twin towers, a bigger plane came crashing in, destroying all that was left
Explanation:
Because it gives them pride in what they are doing
