Which One of the Following Quantities Is Equivalent To $1 \mathrm {~W}$

Which one of the following quantities is equivalent to $1 \mathrm {~W}$ ?

A) $1 \mathrm {~A} \cdot \mathrm { s }$
B) $1 \mathrm {~V} / \Omega$
C) $1 \Omega \cdot \mathrm { m }$
D) $1 \mathrm {~V} / \mathrm { A }$
E) $1 \mathrm {~V} \cdot \mathrm { A }$