The correct option is B Protista
Kingdom Protista is characterized by unicellular eukaryote and reproduces by the fission. The unicellular body organization, the presence of 70S bacteria, asexual reproduction by binary fission in protists suggests their origin from prokaryotic monerans and cellular structure suggested that multicellular eukaryotes have originated from protista. Thus, protists are linked between prokaryotes and multicellular eukaryotes.