A Resistor Develops Heat at the Rate of 20 W $\Omega$

Multiple Choice

A resistor develops heat at the rate of 20 W when the potential difference across its ends is 30 V.The resistance of the resistor is approximately

A) 45 $\Omega$
B) 5.5 $\Omega$
C) 30 $\Omega$
D) 13 $\Omega$
E) 2 $\Omega$