Three main factors that motivates switching prescription drugs to over-the-counter drugs are: is it something people can easily die from, is it a powerful drug that could be used to get high or overdose, and is it safe for people to take. If people switch drugs to over-the-counter there is more of it and it isn't a rare thing to find. It makes the medication less expensive.
I think A. When a person dies at home blood circulation can't be maintained to the organs that's what happened to my dad
Which public health policies help prevent communicable diseases?
-D. Food inspection