Concept:Asexual reproduction in Paramecium and many protists occurs by simple cell division.Explanation:Paramecium reproduces asexually by binary fission, where the cell divides into two identical daughter cells.Protists, including amoeba and Paramecium, commonly reproduce by fission.Budding, sporulation, and fragmentation are not the common method shared by Paramecium and protists generally.Answer:D. fission