Which of the Following Random Variables Is Geometric

Multiple Choice

Which of the following random variables is geometric?

A) the number of phone calls received in a one-hour period
B) the number of cards I need to deal from a deck of 52 cards that has been thoroughly shuffled so that at least one of the cards is a heart
C) the number of digits I will read beginning at a randomly selected starting point in a table of random digits until I find a 7
D) all of the above
E) none of the above