According to the zero-exponent law, which of the following statements is correct?

Correct answer: \(a^0=1,\ a\ne0\)

For any non-zero real number \(a\), \(\frac{a^m}{a^m}=a^{m-m}=a^0\). Since the value on the left is \(1\), we get \(a^0=1\), where \(a\ne0\). Option D is a close distractor, but the zero-exponent law cannot be applied when \(a=0\); in school algebra, \(0^0\) is generally treated as undefined. Exam tip: Always remember the condition \(a\ne0\) with the zero-exponent rule.