You didn't add the choices, but I've had this question before the answer is that nearly all of the male immigrants were male, so children came from unions with Native Americans.
The answer would be Bantu!
The correct answer is he broke up the Northern Securities Company.
Theodore Roosevelt was the "trust-buster" that is he broke up monopolies and the Northern Securities Company was a railroad trust that consisted of E. H. Harriman, James J. Hill, J.P. Morgan and of course those who worked with them. They were the first company that was sued in 1902 under Sherman Antitrust Act which was enforced by Justice Department who were working under orders by Theodore Roosevelt.
The Berlin Conference was the destruction of Africa in more than one sense: the colonial powers divided the countries of the African continent; When independence progressively returned to Africa in the second half of the 20th century, the continent had such a degree of political, social and cultural fragmentation that it has not yet been able to rise.
At the time of the conference, 80% of Africa remained under local control. What ultimately resulted was a hodgepodge of geometric boundaries that divided Africa into fifty irregular countries. This new map of the continent was superimposed on the thousand cultures and indigenous regions that existed. The new countries lacked cohesion, divided coherent groups of people and merged disparate groups that did not really get along.