The answer is B. The Berlin Conference defined the rules and the agreements for European Empires to successfully colonise Africa.
Unfortunately the League failed miserably in its intended goal: to prevent another world war from happening (WW2 broke out only two decades later). The idea was for the League of Nations to prevent wars through disarmament, collective security and negotiation.
A direct primary is an election. In this election voters choose candidates directly to run on a party's ticket. There will then be an election for office.
