Over the course of the twentieth century there has been no pronounced tendency for concentration in the United States to increase

Entry of new firms into an existing market causes:

A) an upward movement along the market supply curve. B) a downward movement along the market supply curve. C) a rightward shift of the market supply curve. D) a leftward shift of the market supply curve.

Other things being equal, what impact does enhanced consumer information on the risk of colon cancer linked to red-meat consumption have on the equilibrium in the market for beef?

A. A decrease in both price and quantity; B. An increase in price and decrease in quantity; C. A decrease in price and an increase in quantity. D. Not enough information is provided to answer this question;