The correct option is D critically endangered
Species are classified by the IUCN Red List into nine groups. Extinct, extinct in wild, critically endangered, endangered, vulnerable, near threatened, least concern, data deficient and not evaluated.
A rare species is a group of organisms that are very uncommon, scarce, or infrequently encountered. An exotic species is one that lives in a particular place, but has been moved to a new geographic location due to human interference.
Critically endangered species are those that are under extremely high risk of becoming extinct in the wild in the near future.
Vulnerable species are under the risk of becoming endangered in the near future.