A movement along a demand curve is most likely to be caused by

Of the following countries, which is the best example of a mixed economy?

A) Mexico B) Cuba C) North Korea D) China

Perfectly competitive firms are earning economic profits at a market price of $18 and an average total cost of $15. If new firms enter and increase the average total cost for all firms, the market price will ________ until ________.

A) fall; it reaches the new lower average total cost B) increase; it reaches the new higher average total cost C) fall; it reaches the new higher average total cost D) increase; economic profits are equal to zero