The correct statement is:

Zero in the divisor makes the answer undefined.

Explanation:

• Division by zero is undefined in mathematics. For example, trying to calculate $\frac{a}{0}$ (where $a$ is any number) is undefined because there's no number that, when multiplied by zero, would give the dividend $a$.
• Zero in the quotient, product, or dividend does not make the expression undefined. These cases result in defined values depending on the context.

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Here are 5 related questions:

1. What happens if zero is in the dividend but the divisor is non-zero?
2. Can zero be a factor in multiplication? If yes, what is the result?
3. What are the rules for handling division by zero in calculus?
4. How is division by zero treated in real-world applications?
5. What is the difference between undefined and indeterminate forms in mathematics?

Tip: Always remember, dividing by zero is undefined, but multiplying by zero always gives zero.