As of 2009, what percentage of the U. S. population can trace their roots to Africa? Select the best answer from the choices provided. A. about 5% B. about 12% C. about 20% D. about 25%

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).

he sent troops to protect the students as they entered the school.

the answer is aggresion hope this and mark me as brainiest and add me as friend