The Following Figure Shows Equilibrium at the Industry and Firm

The following figure shows equilibrium at the industry and firm level.Figure 10.6
In the figure,
S₁, S₂, S₃ are the market supply curves.D₁ and D₂ are the market demand curves.MC is the marginal cost curve of the firm.MR₁ and MR₂ are the marginal revenue curves of the firm.ATC is the average-total-cost curve of the firm.
-When firms leave a perfectly competitive market, then, other things remaining unchanged:

A) the market supply will decrease but the market price will rise.
B) both the market supply and the market price will fall.
C) both the market demand and the price will increase.
D) the market demand will decrease but the market price will rise.
E) both the market demand and the market supply will decrease.