Why did the original schism occur within the Islamic religion?

Springer is one of the leading international scientific publishing companies, publishing over 1,200 journals and more than 3,000 new books annually, covering a wide range of subjects including biomedicine and the life sciences, clinical medicine, physics, engineering, mathematics, computer sciences, and economics.

Explanation:

answer; ///i do believe that the correct answer is (d); ///athens had a small population;