What are the two main divisions within the islamic faith, based on belief about proper succession of leadership?

Shi'a and Sunni

Explanation:

There was a divide because many didn't agree on who their next representative and leader should be. the Shi'a remained loyal to the forth caliph, since they believed that the title should stay in Muhammad's family. The Sunni didn't agree and accepted the Umayyad and Abbasid rulers.

a governess was mean to her.

explanation:

option d is correct. corroborated sources of historical evidence   is necessary to validate a claim about an event in history.

historians tend to use written sources, but audio and visual materials as well as artifacts are important objects that supply information to modern historians.

historical sources are usually divided into two categories: primary and secondary sources. depending on the historian's intent, some sources shift their designation. determining what type of sources toimplement, and the level of credibility and reliability of those sources, is a significant step in critical thinking for the historian.

explanation: