In microeconomics, which of the following is synonymous with decreasing returns of scale?

Electricity has a negative production externality because _____

A. its marginal benefit decreases as more of it is consumed B. the marginal private cost of producing it increases as more of it is produced C. the marginal social cost of producing it exceeds the marginal private cost of producing it D. a marginal external cost lowers the marginal benefit from consuming it

A firm's accounting profit is measured as

A) operating expenses minus revenue. B) revenue minus operating expenses and taxes paid. C) revenue plus operating expenses minus taxes paid. D) net worth minus economic profit.