Gas Jets Have Often Formed Perpendicular to the Plane of the Accretion

Multiple Choice

Gas jets have often formed perpendicular to the plane of the accretion disk around a black hole or a neutron star. What propels the gas away from the hole or star?

A) magnetic forces from the object's strong magnetic field
B) conservation of momentum since the outgoing particles are pair-produced as virtual particles near the object
C) enormous pressure of the compressed infalling gas of the accretion disk
D) strong curvature of spacetime near the object