An accident on a state highway rendered Jill in a comatose state for nearly a month.There was an old nurse who used to take care of her then.After her recovery,Jill felt so indebted to the nurse that she contracted to transfer all her assets to her to fulfill her (Jill's) moral obligation.Although this contract lacks ________,it can be enforced.

A) value
B) consideration
C) acceptance
D) capacity

As a general rule,promises made to satisfy a preexisting moral obligation are unenforceable for lack of consideration.The fact that a promisor or some member of the promisor's family,for example,has received some benefit from the promisee in the past (e.g. ,food and lodging,or emergency care)would not constitute consideration for a promisor's promise to pay for that benefit,due to the absence of the bargain element.Some courts find this result distressing and enforce such promises despite the absence of consideration.In addition,a few states have passed statutes making promises to pay for past benefits enforceable if such a promise is contained in a writing that clearly expresses the promisor's intent to be bound.