The correct answer is B) Shiite.
The Shiites created the office of the "Imam" or leader/guide.
Islam has to branches, the Sunnies and the Shiite. The Shiites supported the 4th caliph. Shiism is the name of the religious movement. They believe that Ali, Muhammad's son in law, was his direct successor and that Abu Bark conspired to overthrow Ali. Abu Bark is the leader of the community the Sunni Muslims chose after the death of Muhamad.