Promissory estoppel claims require reasonable reliance on a clear promise. Thus the correct option is C.
A person may reclaim based on a promise made if they fairly believed in it and the entity seeking to recover performed so in a manner that was harmful to them. This concept is known as promissory estoppel.
In place of a written contract, It is a legal and executable contract that is based on a promise, such as one demanding payment for services done in order to protect the contractor's interests.
Therefore, option C is appropriate.
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