Pretty sure it’s B cause i did this question before
This would definitely be true.
C. Being polite in your emails and discussions.
I don't fully understand your question but what i assume you are trying to ask is WHY her mucus is part of the chain of transmission.
JoAnn's mucus still contains active cultures of the cold virus that is affecting JoAnn. thus her mucus would be able to transmit the virus to others.
She needs to control her diet. This helps because it makes her healthier, and less sugar will decrease her risk.
She also needs to exercise daily to keep herself healthy
