What percentage of Americans currently view themselves as extremely conservative?

What is the crucial element in making an accurate inference?

a) obtaining a representative sample of the population b) obtaining a representative population of the sample c) being well versed in multivariate statistical procedures d) doing a good literature review

Wind, solar, and geothermal energy are alternatives to U.S. dependence on fossil fuels. Which of the following statements describes these alternative sources?

A. The government has set a deadline of 2020 to have at least 50% of the nation's energy coming from alternative sources. B. Technology has yet to be developed that would allow these sources to produce the quantity of energy needed to replace coal plants or other current energy sources. C. These alternatives pose no threat to the environment and area wildlife. D. The majority of Americans favor nuclear power as a more realistic alternative to meeting the country's energy requirements in an efficient manner. E. They have been discussed in only a hypothetical sense and have yet to be put into actual use.