Respuesta :
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.
The context clues show that the dipping of letters in vinegar to prevent the spread of yellow fever was not a good conclusion.
What are context clues?
Context clues simply means the hints that are given by the author in a literary work. They're important for readers to understand a story.
In this case, the context clues show that the dipping of letters in vinegar to prevent the spread of yellow fever was not a good conclusion as it didn't work.
Learn more about context clues on:
https://brainly.com/question/11247029