The Clear Plastic Company's plant discharges large quantities of toxic chemicals into some groundwater sources. Residents in the surrounding area have higher medical bills because of Clear Plastic's pollution. These additional medical costs represent

The figure above shows the cost, demand, and marginal revenue curves for a monopoly. The firm

A) will make an economic profit of $20. B) will charge a price of $10 per unit. C) will produce 20 units per day. D) is a natural monopoly.

Some poor countries appear to be falling behind rather than catching up with rich countries. Which of the following could explain the failure of a poor country to catch up?

a. The poor country has a health epidemic such as the Zika virus b. The poor country imposes heavy tariffs to protect infant industries c. The poor country has many corrupt officials d. All of the above