The smallest bone is stapes
I would like to say around 20-25 people
A should be your answer because because both drugs can create a chemical to large (depending on the drug) to handle and that can cause liver damgage
but if you read evrything i said "drug synergism" is when too chemicals are combined and get larger
now drug addiction also makes sense but before you could get addicted you might die
Wear protection like knee guards, helmet, arm guards etc. Stuff that would help her stay safe incase she fell. Or to stay on a wall and look for guidance.