The correct answer is A. Archae
Step-by-step explanation:
In biology, a domain is the highest taxonomy rank, this is known as super-kingdom because it is bigger than kingdoms and therefore is higher than class, order, or species. According to this, examples of domains include Eukarya which are organisms composed of cells with a nucleus; Bacteria which are prokaryotic organisms (cells with no defined nucleus); and Archaea which are also prokaryotic organism but are a different domain because they differ from bacteria. According to this, the one that is an example of a domain is Archaea.