None of them are correct.
The product of a rational number and an irrational number is always irrational, except in the case where the rational number is zero. In that specific case, the product would be zero, which is rational. Therefore, Simon's statement is partially correct but doesn't account for the case when the rational number is zero, Asia's statement is only true if the rational number is zero, and Jiovanni is incorrect because the product is not always rational.