How are organisms in the domains Bacteria and archaea similar

A - They contain protists

B - They contain nuclei

C - They are multicellular

D - They prokaryotes

Theyre prokaryotes (and are also unicellular)

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.