Why are primary sources Important when studying historical events? A. because they are a direct link to the events in history B. because we would know very little about major historical events without these sources C. because primary sources are the only way we can learn about the culture of a civilization D. because secondary sources are not rellable enough and can't be trusted​

I think b is the right answer

Primary sources fascinate students because they are real and they are personal; history is humanized through them. Using original sources, students touch the lives of the people about whom history is written. They participate in human emotions and in the values and attitudes of the past.

the conditions that made the byzantine empire vulnerable to attacks by the muslin turks were the sack of constantinople by western crusaders, the conquests of the sultanate of rum, presence of rival kingdoms and finally the set up of fiefdoms at the empire which were owned by the ghazis (turkish warriors).