Amnesty International has its headquarters at –

Berlin
New York
Washington
London

The correct answer is D. London.

Amnesty International is a non-governmental organization focused on human rights. It was founded in London in 1961 by Peter Benenson. The organization has over 7 million members and supporters around the world. Its headquarters are located at 1 Easton Street, London WC1X 0DW, United Kingdom.

The other options are incorrect. Berlin is the capital of Germany. New York is the most populous city in the United States. Washington, D.C. is the capital of the United States.