The correct answer is - A. Cecil Rhodes and Leopold II traveled into the interior, showing other European leaders that such journeys were advantageous.
Rhodes and Leopold II in a way opened the gates for the European leaders to have the desire and go to the interior of the African continent. It was not just because of the possibility to do so because the African tribes were by far disadvantaged technologically and military compared to the Europeans, but it was the treasures that the continent was offering and how easy was it to get to them and use them for trade and become wealthy. That lead to a major colonization of the continent by the European colonial powers, and they took full advantage of the natural resources Africa had to offer.
Purchasing power fell because of inflation
<span>Although it is popularly believed that the German army was the first to use gas it was in fact initially deployed by the French. In the first month of the war, August 1914, they fired tear-gas grenades against the Germans. </span>