What is one outcome of improved energy efficiency? 

A)  It uses nonrenewable fossil fuel supplies faster. 
B)  It provides less time for phasing in renewable energy sources. 
C)  It improves national security by reducing dependence on imported oil. 
D)  It eliminates excess jobs.

Improved energy efficiency reduces the dependence on imported oil, which in turn improves national security. It also helps to conserve limited nonrenewable resources. Option A and B are incorrect as energy efficiency does the opposite of using nonrenewable resources faster and provides more time for phasing in renewable energy sources. Option D is also incorrect as improved energy efficiency can lead to the creation of new jobs in the renewable energy sector.