List the Elements in the Sample Space of the Experiment

List the elements in the sample space of the experiment.
-A group of 18 people are assigned numbers 1 through 18. List the sample space of the event choosing a person with a number 5 or less.

A) {1, 2, 3, 4, 5}
B) {1, 2, 3, 4}
C) {18}
D) {1}