WILL UPVOTE PLZ HELP!!

{(3,2), (-6,2), (7,3), (8,4)}

What is the range of this function?
A) {2, 3, 4}
B) {7, 3, 8, 4}
C) {3, -6, 7, 8}
D) {3, 2, -6, 2}