B! Is the answer
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The Tripartite Agreement served as a warning toward the United States.
The Revolutionary Armed Forces of Colombia (FARC) and the Shining Path in Peru are both communist guerrilla groups. The FARC is a "guerrilla movement involved in the continuing Colombian armed conflict since 1964" and Shining Path is a "Maoist guerrilla insurgent organization in Peru."
Google says- boys benefited the most
At the time of the arrival of Europeans, the indigenous population was estimated to be just below 40 million people. After the contact with European diseases it is said to be significantly reduced and estimates suggest that in 1650 this population could be around 8-9 million people. (this is just an estimate, but it's the best from all the offered answers).