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.
Yes it is because many drug users use things such as syringes and needles and thats how it is spread and also they have very low immune systems most of them making it a higher risk of them to get a infectious disease such as HIV,Aids
