Which of the following statements is/are correct?

a. A comprehensive Wildlife Act was enacted in 1973. b. The Wildlife Act is aimed to provide protection to the endangered species listed in the Schedule of the Act and to provide legal support to the conservation areas of the country classified as national parks, sanctuaries and closed areas. c. The Wildlife Act was amended in 1991 and has made provisions for the protection of specified plant species and conservation of endangered species of wild animals.