WHAT WAS THE CAUSE OF THE SPREAD OF THE MEDIEVAL BLACK DEATH? Choose one.

FLEAS ON RATS OR MIASMA (BAD AIR)

WHY? ANSWER IN 2-4 COMPLETE SENTENCES. (As a reminder, each sentence must begin with a capital and end with a period.)

The cause of the spread of the Medieval Black Death was fleas on rats. The fleas carried the bacterium Yersinia pestis, which caused the deadly disease. As rats infested crowded cities, the fleas would bite them and then spread the infection to humans, leading to the rapid transmission of the Black Death.