In What/which Domain(s) of Life Is/are Microorganisms Represented

Question

In what/which domain(s) of life is/are microorganisms represented?
A) Archaea
B) Bacteria
C) Eukarya
D) Archaea, Bacteria, and Eukarya

Accepted Answer

Microorganisms are represented in all three domains of life, which are Archaea, Bacteria, and Eukarya.