In a labor market,
a) The supply curve indicates that, if the products/services are sold at a certain level of price, how many labors are needed to produce the products/services.
b) When there are excessive nursing students graduated, the demand curve for the labor market will shift downward (to the right).
c) The demand curve represents, at a certain level of wage, the quantity of labor demanded by employers.
d) In a rural area where there is only one healthcare facility, this facility would have the power to hire health workers at a lower level of salary. We call it the power of monopoly.