Concept:The Second World War changed African nationalists’ outlook from seeking reforms to demanding full independence.Explanation:After 1945, African nationalists became more assertive because the war had boosted their morale.The war exposed the myth of white supremacy and showed that colonial powers could be defeated or weakened.African soldiers had fought alongside Europeans and seen their vulnerabilities.This strengthened their confidence to demand self-government and independence rather than mere reforms.Answer:D. The Second World War boosted their morale.