Which of These Random Variables Has a Geometric Model

Multiple Choice

Which of these random variables has a geometric model?

A) The number of Democrats among a group of 20 randomly chosen adults.
B) The number of cars inspected until we find three with bad mufflers.
C) The number of people we check until we find someone with green eyes.
D) The number of aces among the top 10 cards in a well-shuffled deck.
E) The number of cards of each suit in a 10-card hand.