Still puzzling archaeologists

Suppose you were able to choose three fossils to extract DNA from and your goal was to test the hypothesis that completely modern humans evolved in Africa. Which three would you pick? Explain why.

Important information: This discussion is to focus on MODERN humans. That means hominids that appeared in the fossil record after 300kya. Please focus on the topic. Consider how you would use DNA to test the origins of modern humans. No discussion of apes, australopithecines and earlier species of the genus Homo (before 500 kya) in your answer.