Which of these expressions, when simplified, represents an irrational number?
(0.83) (), because the product of two rational numbers is irrational
(236) (2/121), because the product of two irrational numbers is irrational
(318) ( ), because the product of an irrational and a rational number is irrational
(0.43) (V169), because the product of a rational and an irrational number is irrational