Every promise and every set of promises forming the consideration for each other is _______Select one:a.Agreementb.Contractc.Offerd.Acceptance

The correct answer is a. Agreement.

Here's why:

A promise or a set of promises that form the consideration for each other is an agreement. In legal terms, an agreement is the first step in the formation of a contract. It involves two parties: the offeror, who makes the offer, and the offeree, who accepts the offer.

A contract, on the other hand, is a legally binding agreement. It is an agreement that the law will enforce. It is a contract when an agreement is enforceable by law.

An offer is a proposal by one party to another to enter into a contract. It's the initial stage of making an agreement.

Acceptance is the final and unqualified expression of assent to the terms of an offer. It's the second stage in the formation of a contract.

So, in the context of the question, the correct answer is a. Agreement.