Decide Whether the Relation Represents a Function

Multiple Choice

Decide whether the relation represents a function. If it does, give the domain and the range.
-{(- 1, 6) , (3, - 8) , (3, 4) }

A) Function; domain: {6, - 8, 4}; range: {- 1, 3, 3}
B) Not a function
C) Function; domain: {- 1, 3, 3}; range: {6, - 8, 4}
D) Function; domain: {6, - 8, 4}; range: {3}