If each digit in the set A = {1, 2, 3, 4, 5, 6, 7, 8, 9} is used exactly once, in how many ways can the digits be arranged?  Choices
A) 356,580  B) 358,680  C) 360,780  D) 362,880  E) 364,980
9! = 362,880   The answer is 362,880.
<result>D</result>
If each digit in the set A = {1, 2, 3, 4, 5, 6, 7, 8, 9} is used exactly once, in how many ways can the digits be arranged?