Answer:
Because people did not know that yellow fever was caused by the bite of an infected mosquito, they assumed incorrectly that people could catch the disease through touch. To help control the disease, letters were cleaned with vinegar before being sent. This did not work, because it was a false cause-and-effect relationship.
<span>A. Teresa was bit by bugs on her last picnic</span>
<span>She's now having to endure the questioning of her classmates, and she's fine with that. It's an acceptance of self</span>