What are the domain restrictions of m^2-4m-21/ 8m^2 n?

A: m ≠ 7, n ≠-3

B: m ≠ 8, n ≠ 0

C; m ≠ -7, n ≠ 3

D; m ≠ 0, n 0

The only restriction is m=0, because ih such case the denominator is 0. But you must add n≠0, because 0^0 means nothing.

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