President Roosevelt and Prime Minister Churchill wanted to create the Declaration on Liberated Europe which was expressed in a sentence "the right of all people to choose the form of government under which they will live." due to preserve European countries (mainly Poland) from the taking over by Stalin
He believed that colonization is bad and that former colonies with slaves should not be recolonized by someone else. The common practice was that when you help a colony free itself, the slaves go free but you keep the country as a colony of your own just with abolished slavery. He supported the idea that they should be left to be independent.
The answer is B. The history of the Madeira and Canary Islands.