American farmers who sell beef to Europe benefit most from

The U.S. aggregate demand curve is downward sloping because

a. an increase in the U.S. price level causes an increase in U.S. spending on consumption goods b. at lower U.S. price levels, real wealth decreases, causing a decrease in the quantities of U.S. goods and services demanded c. at lower U.S. price levels, interest rates decrease, causing a decrease in the quantities of U.S. goods and services demanded d. at lower price levels in the U.S., U.S. exports become more attractive abroad, the demand for them increases, causing an increase in the quantities of U.S. goods andservices demanded e. increases in the U.S. price level do not affect American's real wealth

Explain the concept of efficiency as it relates to taxation.

What will be an ideal response?