List the Elements in the Sample Space of the Experiment

Multiple Choice

List the elements in the sample space of the experiment.
-A lottery uses balls numbered 1 through 31. List the sample space of the event picking one even-numbered ball.

A) {30}
B) {2, 4, 6, . . ., 30}
C) {2}
D) {1, 2, 3, . . ., 31}