During a promotional event, two customers at a clothing store between 9-10 A.M. will be randomly selected to win a gift certificate. Suppose you and a friend visit the store and there are 19 other customers between 9-10 A.M. What is the probability you and your friend will NOT both win the gift certificate?
(A) 1/210 (C) 2/21
(B) 2/19 (D) 209/210