Answer:
The answer is: A) is correct because there was no bargained-for exchange for the raise.
Step-by-step explanation:
Dan is correct since nothing was bargained here. For a contract to be binding, both parties must give or promise to give something in exchange, e.g. I will pay $5 and the restaurant will give me a hamburger.
In this case Naomi didn't give anything to Dan or didn't even promise to give anything to Dan.