Answer
D
Work Step by Step
Option A is incorrect. Bacteria are not eukaryotes because they do not have nuclei or membrane-bound organelles.
Option B is incorrect. Protists are eukaryotes; therefore, bacteria are not protists.
Option C is incorrect. Only some bacteria are considered archaea.
Option D is correct. All bacteria are considered prokaryotes because they are organisms that have no nuclei or membrane-bound organelles.