D is the answer due to lack of knowledge and accessibility
Numerous people.... Diabetics who are experiencing nerve degeneration of the extremities (something called Diabetic Neuropathy). Another group would be the elderly, who do loose sensation as age progresses. And lastly those with some sort of paralysis or peripheral nerve damage.
As people are always dying and babies are always being born so doctors don’t know the exact figure of the population, just an estimate.
hope this helps x
I would say tylenol because it was used as a pain killer back then
