The berlin conference in 1884 was significant because it answer

The Lecture in Berlin of 1884-85 was a meeting among European nations to create rules on how to pacifically divide to Africa among them for the colonization. The lecture was summoned for Portugal but led for Otto von Bismarck, chancellor of the just united Germany. Although invited, the the U.S.. declined to participate. The resultant accord, the General Law of the Lecture in Berlin of 1885, prohibited the commerce of slaves, although not in the reality, especially in Congo Free State checked for Belgium, but it encouraged to the European nations to colonize and to aggressively exploit the human and natural resources of Africa, or to lose their claims under the Principle of Effectivity

the answer is d. party organizers, volunteers, voters and elected officials.