When there is no consideration, a party might be able to rely on promissory estoppel, if: $1)$ there is a clear promise; $2)$ promisor should have expected that the promisee would rely on the promise; $3)$ the promisee did justifiably and substantially rely on the promise by acting or refraining from acting; and $4)\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_$

Group of answer choices

enforcement of the promise is necessary to make everyone happy

enforcement of the promise is necessary for contract law

enforcement of the promise is necessary to avoid fairness

enforcement of the promise is necessary to avoid injustice.