Final answer:
The class taxon includes all the other taxa listed such as genus, order, and species as it is higher in the hierarchical structure of the Linnaean system of classification.
Step-by-step explanation:
The taxonomic classification system, also known as the Linnaean system, uses a hierarchical model to organize living organisms into taxa (singular, taxon). These taxa range from broader, more inclusive categories to narrower, more specific categories. The sequence of these categories, from most inclusive to most specific, is as follows: domain, kingdom, phylum, class, order, family, genus, and species.
Answering the student's question, the taxon that includes all of the other taxa listed (genus, class, order, species) is b. class.