Which numbers will produce a rational number when multiplied by 1/5

A rational number times a rational number=rational numberan irrational number times a rational number=irrational number

remember, a rational number is a number that can be written as a/b where a and b are integers and b≠0

A is irrational because the pattern doesn't repeatb is irrational because it's a crazy square rootC is irrationalD is not irrational, it is a fraction

answer is D