Which effect BEST completes the diagram?
A.With official support, Christianity began to spread rapidly and flourish throughout the empire.
B.With official support, Christian armies began to retake territories previously lost to the Muslims.
C.Even with the emperor's support, Christianity remained an insignificant religion until the end of the empire.
D.Even with official support, the Christian religion could not end the worship of pagan gods such as Mithras.