I believe the answer is language but I may be wrong.
Victorian age literature was often a reflection or a response to historical events and social conditions. This was a time of great change in England. With the Industrial Revolution in full swing, manufacturing cities were overcrowded and dirty. Many citizens were living in poverty and squalor.
Answer: D. They reveal that Belgium had false motivations for colonizing Africa.
Possible Answer: A. They reveal the central goal of European colonies in Africa.
Explanation: Paragraph 7 explains how Leopold plans of “abolishing slavery” and “establishing harmony” was all a scam. Leading to paragraph 8 revealing that Leopold was only focused on his personal business venture. D sounds like it’s the correct answer because his motivations were false, but the other European colonies were also focused on growing their power, so A could possibly be the correct answer too.