Over time, flat-screen TV production costs have come down. Also, more people around the globe have enough money to buy flat-screen TVs because of increased income from economic growth. The net result of these two forces has been more flat-screen TVs sold for lower prices. This is an example of the: demand curve shifting to the right. supply curve shifting to the right. supply and demand curves shifting to the right, with demand shifting farther than supply. supply and demand curves shifting to the right, with supply shifting farther than demand