Respuesta :
To my opinion the answer is C. Water is an accessible and maintainable resource in the majority of the world. I say this because its definitely not A, or D. It could possibly be B but C gives more information on why so many of the sustainable energy options are water solutions. Hope this helps and that you get the question correct, God bless!
Answer:
Water is an accessible and maintainable resource in the majority of the world.