The group of organisms that can be larger than a kingdom is called a a. domain b. phylum c. species d. class

The right option is a. domain
The group of organisms that can be larger than a kingdom is called a domain. A domain is the highest taxonomic rank of organisms in the three domain system of taxonomy. Kingdom is the second highest taxonomic rank, under domain. The tree of life consists of three domains which are Archaea, Bacteria, and Eukarya. The group of organisms under the domain Archaea and Bacteria are all prokaryotic (single celled) microorganisms whose cells has no nucleus while the group of organisms under the domain Eukarya are multicellular organisms whose cells has a nucleus and membrane-bound organelles. 

The answer is b. hope this !