Answer:
Yes, these facts are valid against Hannah which comes under Ratification Doctrine.
Step-by-step explanation:
Here in the question its given that Hannah had allowed her friend to lend her computer for a one week period which was during her thanks giving break.
During those times Carol sold that laptop to a friend which was one of them in their class without asking hannah about this.
Now when after the break hannah and carol both return then carol told her that she had sold her laptop because she was getting an amount from the buyer which was too good to pass up so shesold it that moment.
Now when she gave that money to Hannah she instead of scolding her thanked her and her expression was seeming to be like she had done an awsome job for her.
So, based on the facts the contract was valid because it came under Ratification Doctrine.