rapid genetic mutation in infected cells. consumption of the body's energy resources by viruses. release of toxins by viral particles. body's inflammatory response to infected cells.
I gave my students this multiple choice question: The symptoms of influenza infection are partly caused by the

Only one answer is correct among these 4 choices:
- rapid genetic mutation in infected cells.
- consumption of the body's energy resources by viruses.
- release of toxins by viral particles.
- body's inflammatory response to infected cells.

Could you tell me which one is correct?

body's inflammatory response to infected cells.