-This Diagram Is Used to Illustrate

-This diagram is used to illustrate

A) why an oligopoly firm is unwilling to raise its price above P₀ to P₁ or lower it from P₀ to P₂
B) the "phases of the moon" pricing process used by the electrical industry.
C) the difference between dominant firm price leadership raising the price from P₀ to P₁ and barometric firm price leadership reducing the price from P₀3. to P₂.
D) long-run equilibrium in a perfectly competitive market.
E) the process by which a cartel sets prices and divides up the market among its members.