How might two colliding spiral galaxies tend to create an elliptical galaxy?
A) The orbits of the stars get randomized during the collision, while their gas disks collide and form stars.
B) The collision creates a larger galaxy and elliptical galaxies are always larger.
C) The gas in the disks of the galaxies is expelled into intergalactic space by gravitational interactions.
D) The heat created by collisions between stars causes the disks to puff out into a spherical shape.
A) The orbits of the stars get randomized during the collision, while their gas disks collide and form stars.
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