What issue led to the split between the Sunni and Shia Muslims?

Question

A.
The Shia believed that only Arabs could be Muslims

B.
They disagreed over who should lead the Muslim community after the death of Muhammad.

C.
The Shia wanted to change the direction of prayer to Jerusalem rather than Mecca.

D.
Arguments began over what should be included in the Five Pillars

Answer 1

B. They disagreed over who should lead the Muslim community after the death of Muhammad.

This disagreement centered around the question of leadership and succession, with Sunni Muslims believing that the community should select its leader (the Caliph), while Shia Muslims believed that leadership should stay within the Prophet Muhammad's family, specifically through his cousin and son-in-law Ali.