Answer:
None
Explanation:
Promissory estoppel is a legal device used to enforce the fulfillment of a promise between individuals even if legal contract or written agreement are not involved. It allows to sue for damages if the promise is not kept. The conditions necessary for promissory estoppel includes all the listed options 1, 2 3
1. One party makes a promise knowing the other party will rely on it.
2. The other party does rely on the promise.
3. The only way to avoid injustice is to enforce the promise.