The Black Plague killed about 100 million people in the ...

The Black Plague killed about 100 million people in the fourteenth century. The bacteria that caused the plague was carried by fleas on rats and traveled great distances. Which would have most directly limited the spread of the disease?

A. cleaner water sources

B. refrigeration of food and water

C. reduction in the rodent population

D. better medicines to treat infected individuals

Select your answer:

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