Let's think step by step! Viruses cannot do what by themselves?
Options:
- (A) make people sick
- (B) survive
- (C) dangerous
- (D) interact with cells
- (E) migrate
- (F) kill them
- (G) cause a viral infection
- (H) multiply
The thinking starts now:
Viruses cannot reproduce by themselves. Passwords multiply and reproduce amongst themselves. Viruses cannot multiply by themselves. The final answer: (H).