Assume a decreasing-cost industry that is initially in long-run competitive equilibrium.

Assume a decreasing-cost industry that is initially in long-run competitive equilibrium. A decrease in demand will cause a(n) __________ in prices and profits, and as a result, firms will __________ the industry, causing the market supply curve to shift __________,which, in turn, will eventually cause the equilibrium price to be __________ before.(a)a decrease; exit; rightward; lower than(b)an increase; enter; rightward; higher than(C)a decrease; exit; leftward; higher than(D)an increase; enter; rightward; the same as(E)an increase; exit; leftward; lower than