What do the accounts by mussis and the bull of pope clement vi have in common? how did different groups of people react to the plague?

Pope Clement VI (1291 - 1352) was born in Maumont, Rosiers-d'Égletons, Limousin, Kingdom of France and was pope from May 7th 1342 until his death.  He had the disadvantage to be on the papal chair at the time of the first appearance of the Black Death in Europe. Gabriel de Mussis (1280 - 1356) and he was a notary from Piacenza, Italy, who gave a lucid account of the Black Death (bubonic plague) in the Black Sea city of Kaffa (Feodosia) and in Sicily known as Istoria de Morbo sive Mortalitate quae fuit Anno Dni MCCCXLVIII [“History of the Disease, OR The Great Dying of the Year of our Lord 1348”].

Clement announced two papal bulls in 1348, the latter named Quamvis Perfidiam, which condemned the violence and said those who blamed the plague on the Jews had been seduced by the Devil. He asked the clergy to take action to protect Jews as he had done.

Different groups of people, watching how severe the plague was, started to blame the Jews for the plague, and massacres erupted everywhere in Europe.  

with my knoladg i would say it was c

the answer is b: the religion they practice.

here's why:

there were many different native american tribes and those with similar characteristics formed a main tribe or nation. each had its own language, religion and customs.