Which of the following examples best demonstrates species resistance?
A. Certain strains of H1N1 virus infect both humans and pigs.
B. A worker at an animal shelter encounters a cat with Calicivirus and infects their own cat at home after the cat is exposed to their work clothes.
C. A worker at an animal shelter encounters a cat with Calicivirus, but cannot become sick with Calicivirus themselves.
D. Certain strains of avian flu are transmissible between chickens, ducks, and other birds.
Answer: C
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Fill in the blank(s) with the appropriate word(s).
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A) A B) B C) C D) D E) E
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