Who were allowed under the eastern roman empire's rule to ordain new bishops?
a. other bishops
b. the members of the church
c. the emperor
d. the pope

the answer is a

hope this helps

Europeans introduced horses, livestock, guns and the wheel to native society.

Europeans brought back native crops (potato, corn, beans, etc) to Europe leading to better nutrition.

Explanation:

Columbian Exchange refers to the meeting of new world or western hemisphere of Earth that is America with old world or eastern hemisphere, consists of Europe, Africa, and Asia.

With this Columbian exchange, there was some positive and some negative aspects. positive aspects of columbian exchange include:

Europeans introduced horses, livestock, guns and the wheel to native society.Europeans brought back native crops (potato, corn, beans, etc) to Europe leading to better nutrition.

Negative aspects include:

Native Americans spread diseases to European explorers Europeans unknowingly brought many deadly diseases to the New World