Darla offers to pay Edward $6,000 for Edward's car, provided that Darla receives that much from her uncle's estate, which is currently being probated. She expects to know for sure how much she will receive within a week or so. If Edward agrees: ________

a. there is no consideration present in this example.
b. Two of these but not all three.
c. there is an illusory contract, because Darla is not certain she will receive the money.
d. the consideration from Darla to Edward is the promise of $6,000 subject to a condition.