About ________ of recent annual population growth in the United States is the result of immigration

The figure above shows a perfectly competitive firm. The firm is operating; that is, it has not shut down. The firm produces

A) 20 units of output and makes zero economic profit. B) 20 units of output and incurs an economic loss. C) 10 units of output and makes zero economic profit. D) 10 units of output and incurs an economic loss.

According to the text, a convincing argument against concentration of market power is that

A. The exercise of market power results in a higher price. B. Market power increases incentives for innovation and invention. C. Market power results in lower barriers to entry. D. Large firms can produce more efficiently than small firms because of diminishing returns in production.