If Jack promises to unload landscaping rock from Harry's truck,the truck's arrival would be a(n) ________ of Jack's duty to unload the rock.

A) express condition
B) implied-in-fact condition
C) corporate condition
D) bilateral condition

Implied-In-Fact Condition

A legal concept where the obligations or conditions of a contract are not explicitly stated but can be inferred from the nature of the agreement and the actions of the parties involved.

Express Condition

A provision in a contract that must be met as a prerequisite for performance or fulfillment of the contract terms.