Name the Set of Inputs (Domain) and the Set of Outputs

Multiple Choice

Name the set of inputs (domain) and the set of outputs (range) . The cost of a long distance telephone call is a function of how long the parties talk.

A) {distance}; {units of time}
B) {cost of call}; {units of time}
C) {units of time}; {cost of call}
D) {units of time}; {distance}
E) {distance}; {cost of call}