When a person whose duty is conditional leads the other party to rely on his noninsistence on the condition,the condition will be excused because of  ________.

A) waiver
B) estoppel
C) rescission
D) liability

Estoppel

A legal principle preventing someone from arguing something contrary to a claim previously made or acted upon in good faith.

Waiver

The intentional relinquishment of a known right. It is a voluntary act and implies an election by the party to dispense with something of value, or to forgo some advantage that he or she might have demanded and insisted on.