The correct option is A Prokaryotes
Herbert F. Copeland proposed 4 kingdom classifications. The four kingdoms include monera, Protista, Plantae and Animalia. He introduced the kingdom Monera which included bacteria. He also included the most primitive algae called 'blue green algae' in it because of their prokaryotic organisation.
Copeland (1956) gave the four kingdom classification and included Monera in it. Copeland originally called kingdom monera as mychota.
Kingdom Monera includes all the prokaryotic organisms i.e., Eubacteria (including cyanobacteria, formerly known as blue-green algae) and archaebacteria. The actinomycetes (filamentous bacteria) are also included in this kingdom. Hence, according to Copeland, there are four kingdoms namely,
(i) Monera – Prokaryotic organisms with incipient nucleus such as bacteria, cyanobacteria
(ii) Protista – Having a true nucleate organisms
(iii) Plantae – Having photosynthetic and multicellular organisms
(iv) Animalia – Having non-photosynthetic and multicellular organisms .
So, the correct answer is "prokaryotes"