When the "baby boomer" generation retires, the number of people who require health care increases by 30%, and, as a result, the number of health-care providers also increases, but only by 25%. What is the effect on the price of health-care services over time?a. it decreases because demand increased more than supplyb. it decreases because demand increased by less than supplyc. it increases because demand increased by less than supplyd. it increases because demand increased by more than supply