Answer:
D. an equitable doctrine that prevents the withdrawal of a promise by a promisor if it will adversely affect a promisee who has adjusted his or her position in justifiable reliance on the promise
Step-by-step explanation:
A promissory estoppel defines that it is a doctrine when a person will not be able to go back from a promise even if it is a legal contract. It secured against the financial security.
According to the given situation as we discussed above if there is a effect on promisor the promisor can not withdraw which means it prevents an equitable doctrine who is trying to who adjust his position on the commitment in a justifiable way.