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Forget conventional ways of solving math questions. For DS problems, the VA (Variable Approach) method is the quickest and easiest way to find the answer without actually solving the problem. Remember that equal numbers of variables and independent equations ensure a solution.

The first step of the VA (Variable Approach) method is to modify the original condition and the question. We then recheck the question.

We can modify the question as follows:

\(\frac{r}{s}\) is a terminating decimal if and only if s has no other prime factors than \(2\) and \(5\).

This is the same as condition 2). Condition 1) tells us nothing about the prime factors of s.

Therefore, B is the answer.

Answer: B

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