Which of the Following Is Not a Major Challenge to the Widespread

Which of the following is not a major challenge to the widespread use of renewable energy?

A) There are many concerns about the environmental risks associated with these technologies.
B) The cost of production of these new technologies is high.
C) Government subsidies for fossil fuels reduce incentives for the use of renewable energy.
D) Consumers often have limited knowledge about the source of their electricity.
E) There are uncertainties and risk associated with investing in new technologies.