Which of the Following Statements Concerning Byzantine Military Organization Is

Which of the following statements concerning Byzantine military organization is most accurate?

A) Byzantine soldiers were recruited almost exclusively from peoples outside the empire.
B) The Byzantine Empire emulated the later Arabic empires by making use of slave armies as a basis for the military force.
C) The Byzantine Empire recruited troops within the empire by granting heritable land in return for military service.
D) Military command within the Byzantine Empire remained in the hands of the traditional aristocracy who lived in Constantinople.