He has researched the problem. Good luck!
Correct - Jana: She has a positive (prideful) outlook on herself, despite the fact that it may seem conceited, that's actually a good thing in the right case.
Kurt/Maxine: We know nothing of their mentality, just interests.
Ryan: He's disciplined, but we don't know anything about his mentality.
Answer:
4 - Any substance that contains germs that can be transferred to and from one person to another
