contact with environmental sources contact with an infected animal contact with a contaminated object contact with an infected person
I gave my students this multiple choice question: Ten people became sick with the flu after attending a school dance. What is the scenario that could best explain how the people got sick?

Only one answer is correct among these 4 choices:
- contact with environmental sources
- contact with an infected animal
- contact with a contaminated object
- contact with an infected person

Could you tell me which one is correct?

contact with an infected person