Most doctors had predicted the fever would end when the cold weather returned. Almost all epidemics followed the same pattern, striking during warm weather, disappearing with the first hard frost. Daniel Defoe, in recording the end of the Black Death that visited London in 1665, wrote that "the winter weather came on apace [and] most of those that had fallen sick recovered."

—An American Plague,
Jim Murphy

Which two cause-and-effect relationships are based on facts and could be proven?

A Yellow fever would end with cold weather.
B Diseases always spread faster in the summer.
C Yellow fever would continue throughout the winter months.
D The Black Death decreased during the winter.
E People are always healthier in the winter.

An American Plague is a nonfictional book by Jim Murphy. Yellow fever would end with cold weather and The Black Death would decrease during the winter are the cause-and-effect relationships.

What are cause-and-effect relationships?

Cause-and-effect relationships are the association in which an event or the cause interacts and results in another event or effect. It can have a single cause or multiple causes.

The second event is based on the first and succeeds after the first event has occurred. These causes and effects can be proven by some facts and data. Yellow fever and the black death will decrease or vanish as the winter arrives.

Therefore, option A. yellow fever would end, and option D. black death are the two cause-and-effect relationships.

Learn more about cause-and-effect relationships here:

https://brainly.com/question/15871876

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