Several Organisms,including Some Diatoms and Yeasts,have Intermediate Mitotic Organization

Multiple Choice

Several organisms,including some diatoms and yeasts,have intermediate mitotic organization.Which of the following is the most probable hypothesis regarding these intermediate forms of cell division?

A) They represent a form of cell reproduction that must have evolved completely separately from that present in most eukaryotes.
B) These species are not closely related other diatoms and yeasts,even though they may be similar in outward appearance.
C) They rely on totally different proteins for the processes they undergo.
D) They show some but not all of the evolutionary steps toward complete mitosis.