Which one of the following is correct? The Air (Prevention and Control of Pollution) Act of 1981 was enacted

A. By the Parliament under Article 252(1) of the Constitution after securing enabling resolution from the States

B. By the Parliament invoking the power under Article 253 to make laws implementing decisions taken at International Conferences

C. By the states, as the executive functions under the Air Act are carried out by the State Pollution Control Board

D. By the Parliament based on the directions given by the Supreme Court

Answer: Option B