To improve your health the answer is B. if you wanted to keep it stabilized, I would do a mix of A and B
D because if you have already tried one treatment and it caused a infection you would need to change it
Good balance
Flexibility
Concentration
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.
This warning was most likely issued to prevent people from bringing SARS to the USA when they come back from visiting the countries. So the answer is pretty much to stop the spread