The Following Figures Show the Demand and Supply of Labor

The following figures show the demand and supply of labor in two different types of labor market. Figure 15.5 In the figures,
D: Demand curve for labor
S: Supply curve of labor
MRP: Marginal revenue product
MFC: Marginal factor cost
In Figure 15.5, if a minimum wage of $10 is set by the government, then in market B:

A) wage increases but labor employment decreases.
B) wage increases but labor employment remains constant.
C) wage decreases from $12 to $10.
D) both wage and employment increase.
E) both wage and employment decrease.