Although Modeled on the Byzantine Church of Hagia Sophia, What

Although modeled on the Byzantine church of Hagia Sophia, what is a notable difference in the design of the Mosque of Sultan Selim ?

A) There are no windows at the base of the dome.
B) There is no longitudinal pull toward the apse.
C) The structure employs the horseshoe arches characteristic of Islamic buildings.
D) The ornamental use of muqarnas obscure the dome's physical structure.