The text claims bloodletting is a good treatment for the plague and cured some cases. This an example of a surprising claim that was proven to be accurate. the need to check facts before publishing a book. an error that was corrected with new evidence. the changing standards in textbook publishing.

an error that was corrected with new evidence.

Explanation:

Bloodletting is the surgical removal of blood from a patient to cure illness, disease, and therapeutic purposes including hemochromatosis, etc.

The text claims bloodletting is a good treatment for the plague and cured some cases. This an example of an error that was corrected with new evidence.

where is the picture

the correct answer is:   the domino theory states that if one country in a region came under the influence of communism, then the surrounding countries would follow in a domino effect.