Answer
d) all of the preceding.
Work Step by Step
We know that
$P=\frac{Energy}{Time}=\frac{V^{2}}{R}=I^{2}R$
$P=\frac{Energy}{Time}$ implies watt= J/s
$P=\frac{V^{2}}{R}$ implies watt=$ \frac{V^{2}}{\Omega}$
$P= I^{2}R$ implies that $watt=A^{2}\Omega$.
Therefore option d is correct.
