Answer:
The correct statement with regard to consideration is:
In a unilateral contract, a promise is exchanged for an act or forbearance to act.
So, option b is the correct statement.
Step-by-step explanation:
In a unilateral contract, one party makes a promise in exchange for the other party's performance of an act or forbearance from acting. In contrast, in a bilateral contract, there is an exchange of promises, where both parties promise to do something in the future.