Physics Current Electricity Level: Misc Level

The current through a certain heater wire is found to be fairly independent of its temperature. If the current through the heater wire is doubled, the amount of energy delivered by the heater in a given time interval will

(a)increase by a factor of two<----my answer

(b) decrease by a factor of two

(c) increase by a factor of four

(d) decrease by a factor of four

(e) increase by a factor of eight