The cause and effects of the black plague?

The Black Death hit the culture of towns and cities disproportionately hard, although rural areas (where most of the population lived at the time) were also significantly affected. ... Cities were also strikingly filthy, infested with lice, fleas, and rats, and subject to diseases caused by malnutrition and poor hygiene.

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The cause of the black plague was dirty rats and rodents biting people. And the effects were people getting sick.

Explanation:

In the year 1346, it was a very gross time. There were rodents and fleas running around with bacteria. There are 3 kinds of the black plague: bubonic, septicemic and pneumonic.Signs and symptoms vary depending on the type of plague. Bubonic plague causes infection in the lymph nodes, or buboes. Septicemic plague causes skin and other tissues to turn black and die, especially on fingers, toes, and the nose. And pneumonic is infection in the lungs.

c or d both can be the answer