Answer:
Thank you, I needed this more than you think
Helping out my church and helping out the people who are in need
Patients of hospitals with a high index of suspicion, and Healthcare providers that utilize needles ( primarily because blood from either can get into the wounds of one another).
Additionally I think servicemen are obligated to have one done on them. Additionally those who wish to donate blood are required to have a negative blood test.
The answer is D! Hope that helps!