Answer:
The correct option is D. Both bacteria and archaea are prokaryotes.
Explanation:
Prokaryotes are organisms made up of a single cell and do not possess any of the organelles which are bounded by a membrane. Prokaryotes can be classified into two categories: archaea and bacteria. Hence, option D is correct.
Other options are false because
Option A: Bacteria and archaea are not protists.
Option B: They do not contain a nucleus and their genetic material is present in the form of the nucleoid.
Option C: They are not multicellular.
