As discussed in the case in the text,McLellan v.Charly,promissory estoppel:

A) applies only when the promisee relied on the promise,even if the reliance was not reasonably expected.
B) is used as a consideration substitute.
C) is used when there was consideration that was later destroyed.
D) applies whether or not the promisee relied on the promise.

Promissory Estoppel

A legal principle that enforces a promise when someone else has reasonably relied on that promise to their detriment, even if a formal contract does not exist.

Consideration Substitute

Refers to a principle or factor that can stand in the place of consideration in certain contractual situations, allowing a contract to be enforceable without the traditional exchange of value.

Reliance

The act of depending on or trusting in something or someone, often used in legal contexts to denote reliance on a contract or promise.