Answer
$A%$
Work Step by Step
RECALL:
The product rule $\sqrt{m} \cdot \sqrt{n} = \sqrt{mn}$ is only true when both $m$ and $n$ are positive.
Thus, the answer is $A$.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.