Taxonomic hierarchy refers to
A. Stepwise arrangements of all categories for classification of plants and animals
B. A group of senior taxonomists, who decide the nomenclature of plants and animals
C. A list of botanists or zoologists, who have worked on the taxonomy of a species or group
D. Classification of a species based on the fossil record

Hint: Afterward, a Swedish botanist Carolus Linnaeus presented Taxonomic Hierarchy Categories during the eighteenth century, and this arrangement of characterization is followed all around the world to date.

Complete answer:
The Linnaean arrangement of the order comprises a progressive system of reviewed ordered positions that are called taxa. Every taxon may contain a few lower taxa, which can be typically recognized depending on certain normal characters. The seven fundamental ordered positions in slipping requests are the realm, phylum or division, class, order, family, variety, and species.
"Taxonomic progression is the way toward organizing different life forms into progressive levels of the natural characterization either in a diminishing or an expanding request from realm to species and bad habit versa."The realm is the most significant level of arrangement, which is isolated into subgroups at different levels. There are 5 realms in which the living life forms are characterized, specifically, Animalia, Plantae, Fungi, Protista, and Monera.
The class was the broadest position in the ordered chain of importance until phyla were not presented. Realm Animalia consists of 108 classes including class Mammalia, reptilia, aves, and so forth Nonetheless, the classes utilized today are not quite the same as those proposed by Linnaeus and are not utilized much of the time.

Hence the correct answer is option is (A)

Note:
Ordered progression alludes to the arrangement of classes in expanding or diminishing orders. The realm is the most noteworthy position and species is the least position in the progressive system.