I want to know the answer to the following question:
What did Great Britain control?
All the background I'm provided with is that "Finally, for King Leopold (ruled from 1865–1909), there was the large “piece of that great African cake” known as the Congo, which, unfortunately for the native Congolese, became his personal fiefdom to do with as he pleased in Central Africa.". Is that enough to answer the question?
Answer: no