Assume That a Perfectly Competitive Market Is in Long-Run Equilibrium

Multiple Choice

Assume that a perfectly competitive market is in long-run equilibrium.Suppose as a result of a health hazard associated with the industry's product, demand decreases drastically.The immediate result of this event is

A) The market price falls and the typical firm suffers an economic loss.
B) The market supply increases to offset the fall in demand.
C) The typical firm's average total cost curve shifts downward.
D) The typical firm's marginal cost curve shifts to the left.