Question: A general contractor solicits bids from a group of independent contractors to prepare an overall bid for a particular project. The general contractor selects the lowest bid and incorporates the cost into the overall bid and is awarded the project. The independent contractor with the lowest bid backs out of the deal, prior to the exchange of any consideration. Although we are lacking a major element of a valid contract, a court may nevertheless enforce certain contractual rights because of what doctrine: Group of answer choices Bargained-for Consideration Promissory Estoppel Unilateral Contract Mirror Image Rule