Closed environments in a car lead to high concentrations

Closed environments in a car lead to high concentrations of humidity within the car in the long run, damaging the leather upholstery eventually. Customers of luxury cars complain about such damage since they view it as an additional expense over and above the already high amount they had to pay for the car. Luxuar, one such manufacturer of luxury cars, plans to use carbon-fiber-based synthetic upholstery that provides similar ergonomic experience as the current leather upholstery and that is significantly more resistant to humidity damage.

In deciding whether switching to carbon-fiber-based synthetic upholstery would reduce the number of customer complaints significantly, it would be most helpful to determine which of the following?

A. Whether synthetic upholstery provides a luxurious rich look that is deemed acceptable to the customers of luxury cars for the money they spend on the car.
B. Whether the stain-resistance prowess of synthetic upholstery is at least as comparable to that of conventional leather upholstery to the abuse from liquid spills common in luxury cars.
C. Whether there are some customers who are not worried about humidity-related damage to upholstery.
D. Whether carbon-fiber-based synthetic upholstery withstands humidity for at least 3 times as long as leather upholstery does.
E. Whether there are other materials that can be used in creating upholstery to provide similar ergonomic experience.