The correct option is B They are at risk of getting extinct
The IUCN Red List of Threatened Species categorises the species as follows:
(i) Extinct: The species no longer exists on earth.
(ii) Extinct in wild: The species survives only in captivity, cultivation or outside native ecosystem.
(iii) Endangered: The species is at a very high risk of getting extinct without further human intervention.
(iv) Vulnerable: The species which are likely to become endangered.
(v) Near threatened: These species can be threatened in the near future unless proper conservation is not done.