The market demand curve for the potatoes would shift to the left in reaction to: (1) New research pointing that eating French fries helps prevent cancer. (2) Potato lovers becoming alarmed regarding the rumored potato shortage. (3) Genetic engineering methods that make potatoes taste better than ever. (4) The price of rice, that is a substitute good, declining sharply.
Can someone please help me in finding out the accurate answer from the above options.