[Disappointing Boat Purchase] Ava Went to Purchase a New Boat

[Disappointing Boat Purchase] Ava went to purchase a new boat. She wanted a boat she could use in a nearby lake and also take to the coast for use in ocean waters. Ava saw a boat she liked in the showroom. She showed the boat to Brock, the sales representative at the dealership, and stated that she wanted a boat for both lake usage and ocean usage. Brock told her that the dealership had the best boats in the state, that the engine was great in the boat she liked, and that she would have no problem with steering or with the carburetor. He said nothing about whether or not the boat was an appropriate vessel for ocean waters. Ava purchased the boat. She immediately began to have significant problems with it. The engine did not perform adequately, and there were problems with the steering and carburetor. Additionally, Ava attempted to take the boat onto ocean waters and had significant difficulty. She later discovered that it was not an ocean-going vessel. It was only appropriate for lake usage.
-Which of the following is not a factor that a trial court may find helpful when balancing a product's utility against the risk the product creates, as set forth in the text from the Sperry-New Holland v. Prestage case?

A) The product's safety aspects.
B) The manufacturer's ability to eliminate the unsafe character of the product without impairing its usefulness or making it too expensive to maintain its utility.
C) The product's design, look and feel.
D) The availability of a substitute product that would meet the same need and not be as unsafe.
E) The usefulness and desirability of the product.