Specify the Range for the Relation

Multiple Choice

Specify the range for the relation. {(3, 2) , (5, 7) , (13, 10) , (16, 19) }

A) R = {3, 5, 13, 16}
B) R = {2, 19}
C) R = {2, 7, 10, 19}
D) R = {3, 5, 13, 16, 2, 7, 10, 19}
E) R = {3, 16}