Answer: D: 2mn
Explanation:
To simplify the expression 14m^2n^2 / 7mn, we can cancel out the common factors in the numerator and denominator.
We can cancel out 7 in both the numerator and denominator to get:
14m^2n^2 / 7mn = 2m * n / 1 = 2mn
Therefore, the expression 14m^2n^2 / 7mn is equivalent to 2mn. The answer is option D.