Looking at the Geologies of the Four Large Galilean Satellites

Looking at the geologies of the four large Galilean satellites of Jupiter, we find:

A) remarkable uniformity.
B) totally random characteristics, suggesting that these three satellites were formed at various locations far distant from Jupiter and later captured by Jupiter's gravity.
C) characteristics that change in an orderly fashion with the satellites's distances from Jupiter.
D) two unique sets of characteristics: Io and Callisto being very similar to each other and Europa and Ganymede being similar to each other, but different from Io and Callisto.