Which of the following energy sources is relatively expensive to set up, but has a low cost once it is in place?

Question

Which of the following energy sources is relatively expensive to set up, but has a low cost once it is in place?
A Natural gas
B Coal
C Nuclear power
D Solar power 
I think the answer is D, solar power.
Please help ASAP. Thanks to whoever helps.

Adamissmart · Accepted Answer

Wow are you calling me dom

Adamissmart · Answer

Yes

Cashmere<3 · Answer

Are you sure? @Adamissmart

Adamissmart · Answer

Yes I asked brother before I said yes

Cashmere<3 · Answer

Okay..thanks.

Mrs. Jacup · Answer

Answer is D They are very expensive to set up, but has a low cost once it is in place.

Cashmere<3 · Answer

Thank you!! I wasn't sure about the other person...

Cashmere<3 · Answer

No, I'm not. :) Because you are online and you just give me a flat answer I doubt it. Not calling you dumb. :) Sorry if that's what you thought. I'm not on here to argue.