Option (C) is correct because the context clearly states that Project Tiger was launched in 1973 to conserve tigers and their habitat. The main objective is to ensure maintenance of viable population of tigers in India and to preserve areas of biological importance as natural heritage. The context also mentions that hunting and commercial poaching have been major threats to wildlife, which Project Tiger aims to address. Options (A), (B), and (D) are incorrect as they contradict the conservation purpose mentioned in the text.