The three domains are A Animalia, Plantae, and Archaebacteria B Bacteria, Archaea, and Eukarya
C Plantae, Fungi, and Eubacteria
D Protista, Bacteria, and Animalia

Prokaryotic organisms belong either to the domain Archaea or the domain Bacteria. Organisms with eukaryotic cells belong to the domain Eukarya. So, the three domains are the Archaea, the Bacteria, and the Eukarya.

Hope this helps! Please correct me if I'm wrong :)

for a different answer set the answer would be because the oxygen in the water had depleted (apex)