Motorists have been given an early Christmas present after the Department of Mineral Resources and Energy announced decreases in the prices of petrol and diesel on Friday. The department said that both grades of petrol would decrease by 65 cents per litre while diesel would decrease by between R2.35 and R2.41 per litre." The relative adjustments in the price of petrol and diesel will have which of the following impacts in the market for diesel cars ceteris paribus? A. the price of diesel cars will decrease. B. the demand curve for diesel cars shifts to the right. C. the market for diesel cars will not be affected by a change in the price of petrol. D. the supply curve for diesel cars shifts to the left