For the following product, determine whether the result is rational or irrational and choose the appropriate reason.

5/19 x 4/9

A:The result is rational because the product of a nonzero rational number and an irrational number is sometimes rational.

B:The result is irrational because the product of a nonzero rational number and an irrational number is always irrational.

C:The result is rational because the product of two rational numbers is always rational.

D:The result is irrational because the product of two irrational numbers is sometimes irrational.