Which of the following is the best way to introduce a claim for a paper on the positive effects of solar thermal energy? A.
Solar thermal energy uses the sun's heat to power engines that generate between tens and hundreds of megawatts of electricity.
B.
Solar thermal electric power plants produce energy by concentrating the sun's heat with lenses and reflectors and storing this heat energy.
C.
Solar thermal energy is an attractive energy source because it is sustainable, inexpensive, and adaptable and does not pollute the environment.
D.
Solar thermal companies currently produce power with lower costs than natural gas and intend to beat coal-produced energy prices soon.