The solar system began as a swirling ___ area. Some disturbance caused the cloud to ___ area. As this happened, the density, temperature, and pressure within the cloud ___ area. As material swirled toward the center, the cloud ___ area into a disk. A ___ area developed at the center of the disk as mass accumulated there under the force of ___ area. At some point, ___ area began and the bulge became a ___ area. At the same time, in the surrounding disk, ___ area came together to form rocks. These rocks came together to form ___ area which grew larger through ___ area to form the inner planets and the ___ area of the outer planets.
a) Gaseous, condense, increased, condensed, gravitational, fusion, fusion, solid, accretion
b) Nebulous, condense, increased, condensed, gravitational, fusion, fusion, solid, accretion
c) Gaseous, expand, decreased, expanded, gravitational, fusion, fusion, liquid, condensation
d) Nebulous, expand, decreased, expanded, gravitational, fusion, fusion, liquid, condensation