The correct answer is D. Amnesty International.
Amnesty International is a non-governmental organization focused on human rights. It was founded in 1961 by Peter Benenson, a British lawyer. Amnesty International works to promote and protect human rights in over 150 countries. It does this by campaigning for the release of prisoners of conscience, investigating human rights abuses, and lobbying governments to change their laws and practices.
The French community is a political and economic union of France and its overseas territories. It was founded in 1958. The Organisation of African Unity is an intergovernmental organization of African states. It was founded in 1963. The Arab League is an intergovernmental organization of Arab states. It was founded in 1945.
All of these organizations are important, but only Amnesty International is specifically focused on human rights.