"Useful primary source document" is the one among the following choices given in the question that <span>accurately describes a letter written during the time a historical event occurred. The correct option among all the options that are given in the question is the last option or option "e". I hope the answer helped you.</span>
One of the main reasons why the invasion of the Byzantine empire by the Turks was significant was because that when the Turks first invaded the Byzantine Empire, the Holy Lands in the empire itself were taken over, which caused the Pope to supply troops for the Crusades.
I believe it is TEMPORARY.
I think the answer is c because many presidents get elected if they are above the 20% margin they be in the 40% margin to get elected so i belive the answer is c