Pick your answer from:
A). Leptospirosis;
B). dangerous;
C). ferns;
D). fungi;
E). bacteria;
F). Influenza;
G). acetic acid;
H). anemia;
Given those answer options, answer the question: Fact 1: Viruses cannot reproduce by themselves. Fact 2: Influenza viruses change continually. Given the two facts above, what is something that cannot reproduce by itself?
A:
F).