7. Mechanic Millie installed a new muffler system onto Carries car for the agreed-to price of $1,800. Millie allowed Carrie to take back possession of the car even though Millie has not yet been paid. A week later, upset that she has still not been paid, Millie is considering going to Carries house and secretly dismantling and repossessing the muffler system. Millie would not be wise to do this because

a. Carrie now owns the car with the new muffler system via accession by adjunction

b. Carrie now owns the car with the new muffler system via accession by specification

c. Carrie now owns the car with the new muffler system via confusion

d. Carrie now has rightful possession of the car with the new muffler system as a bailee