D because if you are trying to reduce the carbon footprint then using less coal or oil based energy would be best. plus using the solar panels will help because all you have to rely on is the sun and your own power bank for energy. there for leaving less of a carbon footprint.
The second answer is true, lung cancer is the leading cause of cancer deaths.
I believe that it creates shocks to try and start the heart up again after a heart attack. (why the sticky pads are put with the heart in the middle)
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I'm not sure, but I think it's smoking, or vaping. Or it could be uninetional ingeries. And I would like to be your friend :)
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