2. how did multicellular organism evolved?

I. multicellular organism are believed to have evolved from unicellular eukaryotes
II. single eukaryotic cells for multicellular aggregates through associated with another cell producing colonies
III. from colonial aggregates the organism evolved in order to form a multicellular organism through cell specialization

A. I & II
B. II & III
C. I & III
D. I, II & III​