Demographers Predict That the Average Age of the Population of the U.S.will

Demographers predict that the average age of the population of the U.S.will increase.One result will be an increase in the demand for nurses.Assume that the graph below describes the current nursing labor market in a mid-sized city,and that the market is a competitive one.
Suppose the market started out in equilibrium,with Supply A and the current demand in effect.Relative to that situation,the shift in supply from Supply A to Current Supply together with an increase in demand to Demand,predicted

A) cancel each other out,so that neither wages nor number of nurses changes.
B) cause the number of nurses to increase,but the wages will change minimally if at all.
C) cause wages to increase,but the number of nurses will change minimally if at all.
D) cause both wages and the number of nurses to increase.