I love this book. i suggest u just talk about their character traits in sentences.
Answer:
I think the answer is B), Because the only reason the author would add that evidence is because it's showing that today, birds could spread another disease just like the Spanish flu. Hope this helped :)
Hope it helps!
<em> ItsNobody</em>
Your reading this for no reason i had to make it 20 characters long the answer is false bruh