The Term and Position of Caliph (Khalifa)

The term and position of caliph (khalifa)

A) is equivalent to that of a shaman in New Kingdom Egypt.
B) had no political aspect, as it was a priestly office.
C) was adopted from Byzantine Christianity.
D) referred to the individual who was the temporal successor of Muhammad and who also was considered to be an imam.
E) was abolished with the death of Muhammad.