Answer:
The correct answer is the option A: Exchanging things of value.
Step-by-step explanation:
In the United States' common law, an also other common law jurisdictions, the concept of ''consideration'' in a contract law is a term that refers to the thing of value that identifies the main reason for what both parties make the contract in the first place. Therefore is understandable that the consideration is any thing of value whose property the parties are willing to exchange between each other and succesfully accomplish a law contract.