GRE Reading Comprehension: Manhatton-GRE阅读Manhatton - 6TU7VA4QP_1E7VD8A$

Which of the following is NOT stated as a component of Portugal and Angola's historical relationship? A. Portuguese traders sold Angolan slaves. B. Raw material was taken from Angola by the Portuguese. C. The two nations were at war. D. The Portuguese increasingly dominated Angola over a period of several hundred years. E. Angola achieved independence from Portugal in the 20th century.