The impact of decolonization worldwide after World War II can best be described by option A. In the decades following the war, many empires granted independence to their former colonies, leading to the establishment of new countries. This process varied significantly; some regions experienced a relatively peaceful transition to independence, while others faced violent struggles and conflicts.
While option B incorrectly suggests the creation of new empires instead of new countries, option C inaccurately limits the timeline to the first five years after the war. Option D also mischaracterizes the process by claiming it was violent everywhere, neglecting the instances of peaceful transitions. Hence, option A captures the nuanced reality of decolonization effectively.