The correct option is C 1980
The world conservation strategy was launched in 35 countries simultaneously on 5 March 1980, by International Union for conservation of Nature and Natural resources (IUCN). It is considered one of the most influential documents in 20th century nature conservation and it introduced the concept of sustainable development. It’s core tenents are protection of ecological processes and life-support systems, preservation of genetic diversity and sustainable utilisation of species and ecosystem.