Final answer:
William's promise is not enforceable because it lacks legally sufficient consideration. The correct answer is option 3)
Step-by-step explanation:
The correct answer is option 3) William's promise is not enforceable.
In contract law, for a promise to be enforceable, it must be supported by consideration, which refers to something of value given by one party to another in exchange for a promise. Consideration must be both legally sufficient and bargained-for.
In this scenario, George's promise to refrain from going to college can be considered consideration. However, William's promise to give George a job as his butler is not legally sufficient consideration because it is not something of value.
Therefore, William's promise is not enforceable.