Which Statement Provides the Best Evidence of the Relative Ease

Multiple Choice

Which statement provides the best evidence of the relative ease with which multicellularity has evolved?

A) Experimental studies have shown that in only a few months, multicellularity can be artificially selected for in some normally unicellular eukaryotic species.
B) Plasmodial slime molds, an early-diverging group of protists, are multicellular.
C) Multicellularity allows for nutrient and gas exchange over a larger surface area.
D) Some diatom species associate in filaments; such association is a precursor to multicellularity.
E) Cyanobacteria and other photosynthetic species are known to form floating rafts on the ocean's surface.