How Do Disk Stars Orbit the Center of the Galaxy

Multiple Choice

How do disk stars orbit the center of the galaxy?

A) They have orbits randomly inclined and in different directions relative to the galactic center.
B) They follow spiral paths along the spiral arms.
C) They follow orbits that move up and down through the disk, typically taking them about 50,000 light- years above and below the disk on each orbit.
D) They all orbit in roughly the same plane and in the same direction.