Potential difference and power — practice question

Which combination of current and resistance would give an energy transfer rate of $16\,\text{J s}^{-1}$?

• A$1\,\text{A}$ and $4\,\Omega$
• B$2\,\text{A}$ and $8\,\Omega$
• C$4\,\text{A}$ and $1\,\Omega$
• D$16\,\text{A}$ and $1\,\Omega$