The variables x and y represent nonzero rational numbers. Which situation could be solved using the product of xy, where xy represents a negative value?

A. the change in the price of an item if the price is increased by x dollars one month and decreased by y dollars the next month

B. the change in degrees if the temperature decreases by x degrees per day for y days

C. the amount of Juice Susan drinks in x days if she drinks y fluid Ounces of juice each day

D. the depth of a scuba diver if he dives x feet below sea level and then rises y feet