What was known as the "hidden holocaust"? A) The Zulu War
B) The Sepoy Rebellion
C) The Berlin Conference of 1884
D) The massacre of the Congolese

It would be C. The Berlin Conference of 1884

Explanation:

Leopold II had a hidden holocaust, he was the ruler of Belgium. He started a mass murdering event that showed his greed and turned his head towards anything else.

the right answer for the question that is being asked and shown above is that: "their policy of "divide and rule" pitted political groups against each other to keep any one group from becoming too powerful.  " the  participant in european imperialism is being described below is that  their policy of "divide and rule" pitted political groups against each other to keep any one group from becoming too powerful.