What Event Ended the Conflict of the Nestorians,who Argued for Christ's

What event ended the conflict of the Nestorians,who argued for Christ's divinity after his death?

A) They were excommunicated for heresy.
B) They were condemned at a council but were tolerated quietly.
C) They gained many adherents among the barbarians of western Europe.
D) They went into exile in Persia and spread throughout the East.
E) They established a separatist form of Christianity.