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.

i would think i'ts d hope this out

so, based on the research i've done. the u.s. government were always on a wild goose chase just to take down castro. he then retired his trone to his brother raul in 2008 due to some health issues. so it's obvious your answer would be:

castro had no allies from which he could receive aid.

hope this and have a fantastic day!

                                                    -wolfiewolffromsketch