Vaccines, antibiotics are the major ones. Vaccines inject a dead virus or disease to have your body fight it off and become immune to the disease or virus. Antibiotics like vitamins, are something you take daily to protect the body.
I want to say a because you’re choosing one suited for you and your comparing them to see which one fits you ? But if not then d
I believe the answer is 1. Because if they refuse care then you can do nothing.