Suppose That the Professional Association of Dentists Reduces Entry into Their

Suppose that the professional association of dentists reduces entry into their profession by lengthening the required training program. The likely effect is that

A) the demand curve for dentists will shift to the right.
B) the supply curve of dentists will shift to the left.
C) both the demand and supply curves for dentists will shift to the left.
D) there will be an increase in the quantity of dentists supplied.
E) the supply curve of dentists will shift to the right.