In Which of These Continuums of Degrees of Competition (Lowest

In which of these continuums of degrees of competition (lowest to highest) is oligopoly properly placed?

A) pure monopoly, monopolistic competition, oligopoly, pure competition
B) oligopoly, pure competition, monopolistic competition, pure monopoly
C) monopolistic competition, pure competition, pure monopoly, oligopoly
D) pure monopoly, oligopoly, monopolistic competition, pure competition