When Marginal Damages for a Pollutant Vary by Region, Time

When marginal damages for a pollutant vary by region, time of day, or season, a(n) ________ will not be socially efficient but ________ that set the MAC curve equal to each MDC curve are socially efficient.

A) uniform standard; individual standards
B) ambient standard; uniform standards
C) individual standard; uniform standards
D) technology-based standard; uniform standards