The answer you are looking for is option B
Answer:
A market for cats would have had a positive externality.
Because the cats would kill the rats on sight since that is their natural behavior.
However, it is interesting to mention, that the cat's killing has been more of a "mythic" aspect of this story, since it fails to take into account that since the black death was caused by the<em> yersinia pestis</em> bacteria, cats could have been also infected, and since their interactions with humans are greater than rats or fleas, the real outcome could have been totally unexpected.
It's a fact cuz you can show proof that some people follow this system in their daily life
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-How is society originated?
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-the society originated in the subjugation of the weaker by the stronger. Thus through physical coercion or compulsion men were brought together and made to live in society. The Patriarchal and Matriarchal theories make society the expansion of family system.
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<h3>NOTE:</h3>
THANK ME LATER IF MY ANSWER IS CORRECT
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