Answer
Organism A belongs to Kingdom Animalia.
Organism B is in Kingdom Archaebacteria.
Organism C belongs to Kingdom Fungi.
Work Step by Step
Organism A belongs to Kingdom Animalia. Members of the animal kingdom have cells without cell walls. All are multicellular eukaryotes.
Organism B is in Kingdom Archaea. These organisms live in the most extreme of environments and are unicellular with cell walls not made of peptidoglycan.
Organism C belongs to Kingdom Fungi. These heterotrophic organisms can be either unicellular or multicellular. Their cell walls are made of chitin.