Answer:
Gloria can assert promissory estoppel in order to enforce Phil's promise.
Explanation:
Promissory estoppel refers to a legal doctrine that promises are legally enforceable. This doctrine establishes that in order for a promise to be considered legally enforceable, the party making the promise should reasonably realize that the other party will rely on it and that any reasonable person would rely on the other party's promise. This doctrine helps to avoid injustices by enforcing the promises.