, suppose that email team has proposed a change in the design of the emails that they believe will increase the click-through rate on the emails to 10.2%. The website team also has proposed a design change to the product listing page that they believe will lift the conversion rate to 13.2% without changing the average order value (AOV) of $37.20 or the average margin of 36%. The product design team has proposed a cost reduction in the manufacturing process that will increase the average margin to 40%. Which improvement will result in the greatest improvement in ROI for the campaign?