Because it encouraged later revolutions in other parts of the world. :)
The correct answer is Objective
The Principle of Military Objective requires that every
military operation should be directed toward a plainly well-defined and
practicable goal. This limits military actions to those objects which: by their
nature, location, purpose or use make an effective contribution to military
action
What kind of events are you looking for and in what country??
The statement about the relationship between East, West and South Africa with Europe that is correct is A. Some areas initially benefitted from trade with the Europeans, but eventually, the contact resulted in the division of Africa into separate colonies. South Africa has a violent history consisting of racial and political tension. There is also inter-tribal tension which sometimes flares up into armed conflict between the various groups. The European settlers colonized large areas of South Africa and forced the African people into homelands and reserves.