Amoebas are unicellular organisms, while human beings are multi-cellular and the most intelligent of organisms. however, both are classified as eukaryotes. how will you justify this reasoning?
(a)though unicellular, amoebas have all the necessary cell organelles and a well-defined nucleus, therefore fulfilling the characteristics of eukaryotes.

(b) though unicellular, amoebas have a nucleoid and no cell organelles, therefore fulfilling the characteristics of eukaryotes.

(c) though unicellular, amoebas have a nucleolus but not a nucleus and all the cell organelles except mitochondria, therefore fulfilling the characteristics of eukaryotes.