Which of the Following Is an Example of the U

question 226

Multiple Choice

Which of the following is an example of the U.S.government's use of a "command-and-control" approach to reducing pollution?

• A)In 1990 Congress approved measures designed to reduce sulfur dioxide emissions to 8.5 million tons annually by 2010.
• B)The U.S. government imposed a tax on electric utilities to reduce damages from acid rain.
• C)The government issued electric utilities tradable emission allowances in order to reduce emissions of nitrogen oxide.
• D)In the 1980s the U.S. government required the installation of catalytic converters to reduce emissions from all new automobiles.

---

Definitions:

Major Histocompatibility Complexes

A set of cell surface proteins important for the immune system to recognize foreign molecules, playing a critical role in antigen presentation.

T-cell Receptors

Molecules found on the surface of T-cells that are responsible for recognizing fragments of antigen as peptides bound to major histocompatibility complex (MHC) molecules.

Foreign Antigens

Substances that are recognized by the immune system as non-self, triggering an immune response.

Self-antigens

Antigens present on the body's own cells; usually tolerated by the immune system.