Which of the following statements in relation to sustainable development is NOT true?

Select one:

a. Sustainable development not only considers the protection of the environment but also the maintenance of economic viability as well as the social and ethical considerations

b. Sustainable development is defined as the development that meets the needs of the present without compromising the ability of our future generations to meet their own needs

c. Sustainable development of various countries and the entire world is the only solution left with mankind to survive for a longer period on Earth

d. Sustainability has the main objective of purely focussing on the natural environment