Complete This Sentence: the Sun, Earth, Jupiter, and Saturn's Icy

Complete this sentence: The Sun, Earth, Jupiter, and Saturn's icy moons are all very different environments, _____________________________.

A) the result of each type of object forming from different interstellar clouds
B) but their differences are only because of where each currently is in the Solar System
C) but all formed from the same basic group of chemicals
D) but their differences are because each contains very different chemicals