Which aspects of a four-hour shopping trip can be expected to vary inversely? A) the total distance walked and the number of steps taken B )the total number of stores visited and the average time spent in each store C) the total amount spent on shirts and the average cost per shirt D) the time it takes to walk from one store to another and the distance between the two E) the average wait time to make a purchase and the number of cashiers working in a store F) the number of customers paying by cash and the total number of customers