The correct option is D All of these
Warren Hastings reduced customs duty to encourage Indian trade, He set up a Board of Trade, Many customs houses were abolished by him. In such way he carried out commercial reforms. Warren Hastings prohibited the used of dastaks by the servants of the Company and thereby added to the revenues of the Company. Warren Hastings, an English statesman, was the first Governor of the Presidency of Fort William, the head of the Supreme Council of Bengal, and thereby the first de facto Governor-General of India from 1772 to 1785.