The most probable and the most likely answer that you would get in asking this question would be domain.
As for stating it as a taxonomic group, it is more appropriate to refer to it as category, but there is no arguing that both words can be interchanged so just take that as a personal preference. Domain would be referred to in modern taxonomic category as the category that includes the kingdoms and all the other levels of the taxonomic hierarchy.
It can be A I think it is
Answer:
Circulatory system
Explanation:
The circulatory system is one of the eleven organ systems of the human body. Its main function is to transport nutrients to cells and wastes from cells
Primary purpose of circulatory system is to transport blood throughout the body by circulating
Reproduce asexually because I just put it in and I got it right.
A dog's stomach acid is stronger than ours so they can digest bigger chunks of food unlike us superior humans lol