If a Sound of Intensity I = 1 $\times$ 10^-5 M² (About the Size of Your Eardrum),how Much Power

Multiple Choice

If a sound of intensity I = 1.0  10^-6 W/m² falls on a detector of area A = 7.0 $\times$ 10^-5 m² (about the size of your eardrum) ,how much power is received by the detector?

A) 6.2 $\times$ 10^-14 W
B) 1.0 $\times$ 10^-6 W
C) 7.0 $\times$ 10^-11 W
D) 1.4 $\times$ 10^-2 W
E) 70 W