Another practice problem- thanks for your help!! I think you might have to use monoticy and convexity

You are a used car salesperson. You've got 4 cars that will be priced at $9,499. Car A has 250

horsepower and a safety rating of 2.1. Car B has 175 horsepower and a safety rating of 4.3. Car C has 166 horsepower and a safety rating of 4.2. Car D has 240 horsepower and a safety rating of 2.0. People like higher horsepower and higher safety ratings in their cars. You really want to sell car B as quickly as possible, and you have a customer looking to spend just under $10,000. But this customer kind of likes car A. What is a good plan to convince the customer to buy car B, without lowering the price or providing extra incentives (like free oil changes, a better price on a trade-in, etc