For the entirety of the article, Desmond Tutu points out instances of forgiveness of cruelties that seem to be unparalleled in history to the best of his knowledge. In the final paragraph, however, Tutu claims that “God has chosen this unlikely lot and set us up as some kind of paradigm, as some kind of model that just might provide the world with a viable way of dealing with post-conflict, post-repression periods.” Thus, in looking at the possible responses to your question, “C” seems to be the best response: “It has been chosen by God to show that forgiveness is possible in an unlikely place.”