A．because of the systematic exploitation of Africans.
B．because of the unfavorable climate.
C．because the donation in the past didn't work.
D．because of the war.
参考答案A
解析:
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A．The Slave House on the island of Senegal.
B．The Slave House on the island of Goree.
C．The plantation on the island of Goree.
D．The plantation on the island of Senegal.
