GRE Reading Comprehension: ETS-GRE阅读ETS - 4L7DZXR5M5VW47857

The passage suggests that the existence of a Roman conception of slavery in Spanish and Portuguese colonies had the effect of A. extending rather than causing racial prejudice in these colonies B. hastening the legalization of slavery in these colonies C. mitigating some of the conditions of slavery for Black people in these colonies D. delaying the introduction of slavery into the English colonies E. bringing about an improvement in the treatment of Black slaves in the English colonies