Because it’s first hand information
In my opinion I think U.S president today have less power if they could have than before. The presidents back then would hold office until retirement or until death. Today they can hold office for only two terms for which each is four years long. They still cannot make decisions on their own they need the approval of the two other governing branches. I think the framers of the constitution would be satisfied knowing this is so and that the constitution has been something that has been used to base off democracy appropriately.
Answer: B) African countries were not invited nor welcomed to this meeting.
All of the 14 participants of the Berlin Conference were European, with the exception of the Ottoman Empire which, even thou it controlled some territories in northern Africa, they were autonomous territories.
Besides that fact, there was no participation by any African country, since the conference´s goal was to regulate European colonialism and trade throughout Africa.