The presence of loud noise in the home-building industry leads in the long run to inefficiencies...

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The presence of loud noise in the home-building industry leads in the long run to inefficiencies because A) marginal external cost rises over time. B) marginal external cost is constant over time. C) average private cost in homebuilding is lower than average social cost, so that some homebuilding firms remain in the industry (or are induced to enter) when efficiency calls for them to leave (or stay out). D) average private cost in homebuilding is higher than average social cost, so that some firms homebuilding firms exit the industry when efficiency calls for them to stay (or for more firms to enter). E) fewer resources are devoted to homebuilding than the economy really needs. The presence of loud noise in the home-building industry leads in the long run to inefficiencies because A) marginal external cost rises over time. B) marginal external cost is constant over time. C) average private cost in homebuilding is lower than average social cost, so that some homebuilding firms remain in the industry (or are induced to enter) when efficiency calls for them to leave (or stay out). D) average private cost in homebuilding is higher than average social cost, so that some firms homebuilding firms exit the industry when efficiency calls for them to stay (or for more firms to enter). E) fewer resources are devoted to homebuilding than the economy really needs.

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