Final answer:
The correct order of taxonomic categories is Kingdom, Phylum, Class, Order, Family, Genus, Species.
Step-by-step explanation:
The correct order of taxonomic categories from the most inclusive to the least inclusive is: Kingdom, Phylum, Class, Order, Family, Genus, and Species.
Therefore, the correct answer is option a) Class, Order, Family, Genus, Species.
The taxonomic hierarchy starts with the most inclusive category, which is the Kingdom. Each subsequent category becomes increasingly specific and less inclusive, with Species being the least inclusive category.