The Process of Accretion in Planetary Formation Is the

Multiple Choice

The process of accretion in planetary formation is the

A) slow condensation by gravity of gas atoms into large, dense gas clouds that are the preplanetary masses.
B) slow acquisition from deep space by the giant planets of their complement of moons by gravitational capture.
C) slow accumulation of solid particles by gravity and collision into larger, solid objects.
D) relatively rapid gravitational collapse (in less than 10⁶ years) of gas clouds to form planets.