Which Statement Most Accurately Describes the Colonial Flagellate Hypothesis

Which statement most accurately describes the colonial flagellate hypothesis?

A) Animals are descended from an ancestor that resembles a spherical colony of flagellated cells.
B) Both animals and fungi are descended from an ancestor that resembles a spherical colony of flagellated cells.
C) All animals are descended from an ancestor that resembles a single celled organism that was a flagellated cell.
D) None of these describe the colonial flagellate hypothesis.