In the figure above, which movement could be the result of an increase in the wages paid to oil workers?

Physical or technological facts are by themselves never sufficient to measure efficiency because

A) what is efficient changes over time. B) efficiency is a ratio between evaluations. C) more complex technological processes are inevitably more efficient. D) physical or technological data can never be known precisely. E) we can never be sure we are using the most advanced technology.

When measured as a percentage of GDP, the U.S. national debt reached its highest levels as a result of:

a. World War II. b. The Vietnam War. c. The Reagan defense buildup and tax cut. d. The Bush economic recovery program.