If $E(t)$ Represents the Energy Consumed in a Household in Watts/month, What

Multiple Choice

If $E(t)$ represents the energy consumed in a household in watts/month, what are the units of $\int_{a}^{3} E(t) d t$ ?

A) watts
B) watts/month
C) watts/month²
D) month
E) watts²/month²