Ann is injured in an accident caused by Bob. Bob agrees to pay Ann $$2,500$ if she agrees to release

Bob from further liability. Ann agrees. Ann's vehicle damage and medical bills ultimately exceed $$30,000.$ In this case, Ann

can collect the balance from Bob by suing him for breach of contract.

can collect the balance from Bob by suing him for his obvious negligence.

can collect the balance from Bob under the theory of quasi$-$contract since he was unjustly

enriched.

cannot collect the balance from Bob.