Final answer:
A promise that is made to do something for someone else expecting nothing in return is a gratuitous promise. It is not enforced by consideration.
Step-by-step explanation:
A promise that is made to do something for someone else expecting nothing in return is known as a gratuitous promise. This means that the person making the promise offers to do something out of kindness or generosity, without any obligation or consideration from the other party. Promissory estoppel is a legal doctrine that can be used to enforce promises made in certain circumstances, even if there is no consideration involved. It requires the person relying on the promise to suffer a detriment if the promise is not fulfilled. In this case, the best answer is E) Gratuitous promise because it accurately describes the nature of the promise being made.