In the Magnetic Model for the Bipolar Outflow from a Protostar

In the magnetic model for the bipolar outflow from a protostar:

A) magnetic field lines emanate from the poles of the protostar and carry material outward from the stellar interior.
B) magnetic field lines through the circumstellar accretion disk become twisted and concentrated by the rotation of this disk.
C) magnetic field lines associated with the galaxy as a whole are concentrated and shaped by their interaction with the magnetosphere of the protostar.
D) the jets are formed along magnetic field lines, which go from the north magnetic pole of one protostar to the south magnetic pole of a second protostar that forms a close binary pair with the first.