Offsets, Bubbles, and Banks Are All

Offsets, bubbles, and banks are all

A) pollution-control devices that effectively reduce air contamination.
B) tests conducted by the Environmental Protection Agency (EPA) on agricultural pesticides.
C) devices that restrict air pollutants in certain types of manufacturing environments.
D) pollution-control rules devised by the EPA under its command-and-control strategy.
E) EPA incentives for companies to reduce pollution.