Find the Domain and Range

Multiple Choice

Find the domain and range.
-{(9, -2) , (-2, 2) , (2, 3) , (-3, 7) }

A) D = {-3, -2, 2, 9}; R = {7, 2, 2, 3, -2}
B) D = {7, 2, 3, -2}; R = {-3, -2, 2, 9}
C) D = {-3, -2, 2, 9}; R = {7, 2, 3, -2}
D) D = {-3, -2, 2, 9}; R = {7, 7, 2, 3, -2}