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HI ... why have we ruled out the fact that a number raised to 0 is also equal to 1 and that 0 raised to 0 is also equal to one. m and n could both be equal to 0

HI ... why have we ruled out the fact that a number raised to 0 is also equal to 1 and that 0 raised to 0 is also equal to one. m and n could both be equal to 0

We are told that m and n are positive numbers, 0 is neither positive nor negative.
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I think this is a poor-quality question and I don't agree with the explanation. both the numbers m & n can be 0 . so it should be E.

The question is correct. You should read questions more carefully: we are told that m and n are positive numbers, 0 is neither positive nor negative.
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