The correct option is A Chlorella
Chlorella is a microscopic single celled green micro algae, that has existed on earth for over 2.5 billion years.
Having survived in exactly the same form since the pre-Cambrian period, this micro algae owes its extraordinary survival to two highly unusual features: its unique cell wall and its astonishing capacity of reproduction.
No other algae has generated as much scientific and medical interest as Chlorella. As a matter of fact, for the use of astronauts travelling into space, the researchers from NASA have investigated the fact that Chlorella is so complete that one could survive with it for long periods of time.
Because, Chlorella has been found to contain over 50% protein.