400 Price 300 per unit (dollars) 200 100 0 B SUPPLY DEMAND 50 100 150 200 250 Quantity of output (units per time period) The graph above represents the market for home air purifiers. When wild fires cause smoky air conditions, you would expect the equilibrium to remain at point E O the Supply to shift causing the equilibrium to move to point B. O the Supply to shift causing the equilibrium to move to point D. O the Demand to shift causing the equilibrium to move to point C O the Demand to shift causing the equilibrium to move to point A