For which of the following contributions, the Indira Gandhi Award for work in the field of peace, social service, disarmament and development will be given to Sir David Attenborough for the year 2019?

• A. To awaken mankind to safeguard and preserve the biodiversity of the planet, to live life in a sustainable and harmonious way.
• B. Rural development, education, development of natural resources.
• C. Leprosy eradication in India and around the world.
• D. Improvement in sanitation conditions and freedom from manual scavengers (street scavengers) in India.