Final answer:
Betty has not promised to wash Scott's cars as her acceptance is conditional, and no binding contract supported by consideration has been formed between them.
Step-by-step explanation:
The correct statement regarding Scott and Betty's conversation is that Betty has not promised to wash Scott's cars. She has given a conditional acceptance, stating she will do it if she wakes up in time, which does not constitute a definitive promise or assurance. Therefore, a binding contract supported by consideration has not been formed. In contract law, for a binding agreement to be established, there must be a clear offer and an unambiguous acceptance, along with consideration.
Here, while Scott's offer is clear, Betty's acceptance is uncertain due to its conditional nature. Moreover, Scott's promise to pay Betty 100 represents an intent to form a unilateral contract but it cannot be considered an executed contract until Betty performs the requested action of washing the cars.