#1 would be A, #2 would be false, as narcotics are incredibly addictive. #3 is absolutely true, as abuse of almost any medical thing can be life threatening.
Answer:
her colds were gone after an hour of taking the medication... because the medicine cleared the nosal cavity...
the science of the causes and effects of diseases
Answer: I'm almost certain the answer is drinking alcohol with a friend.
Explanation: A peer can't influence something that is inherited and helping a friend with homework isn't risking anyone's health so the only other answer is drinking alcohol with a friend.