according to current models of solar system formation, why did uranus and neptune end up to be much less massive than jupiter and saturn? group of answer choices a. particles in the solar nebula were more spread out at greater distances, so that accretion took longer and there was less time to pull in gas before the solar wind cleared the nebula. b. the solar nebula had different chemical composition at different distances from the sun, leading to the differences in mass. c. ices were able to condense at the distance of jupiter and saturn, but only rock and metal could condense at the distances of uranus and neptune. d. the size differences are thought to be a random coincidence.