In the figure above, if no one owns the lake, at the equilibrium quantity what is the marginal social cost of producing the pesticide?

In the circular flow model

A) households buy goods and services while firms sell goods and services. Firms obtain labor from households, capital from government, and raw materials from firms. B) households demand goods and services which are supplied by firms, and the firms demand resources that are supplied by intermediate firms. C) households buy goods and services and firms supply goods. Resources are supplied by other firms. D) households demand goods and services that are supplied by firms, while supplying resources that are demanded by firms.

According to the intertemporal substitution effect, a higher price level

A) decreases the quantity of real GDP demanded. B) lowers the costs of building new plants and equipment. C) increases the quantity of real GDP demanded. D) makes it less costly for people to buy houses and cars.