If the Function Is One-To-One, Find Its Inverse

Multiple Choice

If the function is one-to-one, find its inverse. If not, write "not one-to-one."
-{(-3, -4) , (-2, -4) , (-1, 3) , (0, 8) }

A) {(-4, -3) , (8, 3) , (-1, -2) }
B) {(-4, -3) , (-2, 3) , (-1, 8) }
C) {(-3, 8) , (-3, 3) , (-1, -2) }
D) not one-to-one