Consider the graph below. Assume that a union enters the labor market.

What effect does the union have on the quantity of labor supplied? Will this result ina shift of the supply curve?

A.) The quantitysupplied falls. There is no shift of the supply curve.

B.) The quantitysupplied falls. The supply curve shifts to the right.

C.) The quantity supplied rises. There is no shift of the supply curve.

D.) The quantitysupplied rises. The supply curve shifts to the right.