The above figure shows three different supply-and-demand graphs. Which graph best represents the market for the air we are currently breathing?

When discussing the private capital account, asset flows include all but which one of the following?

A) capital expenditures by domestic firms B) foreign securities purchased by domestic citizens C) changes in the balances of a bank's cash deposit from foreign transactions D) an investment in a foreign subsidiary by a domestic firm

In deciding what to buy to maximize utility, the consumer should choose the good with the

A. highest marginal utility per dollar spent. B. lowest price. C. lowest marginal utility per dollar spent. D. highest marginal utility.