Which one of the following best describes the main idea of the passage? A. Although they disagree about the degree to which economic motives influenced Britain's abolition of slavery, Drescher and Eltis both concede that moral persuasion by abolitionists was a significant factor. B. Although both Drescher and Eltis have questioned Williams' analysis of the motivation behind Britain's abolition of slavery, there is support for part of Williams' conclusion. C. Because he has taken into account the populist characteristics of British abolitionism, Drescher's explanation of what motivated Britain's abolition of slavery is finally more persuasive than that of Eltis. D. Neither Eltis nor Drescher has succeeded in explaining why support for Britain's abolition of slavery appears to have cut across lines of party, class, and religion. E. Although flawed in certain respects, Williams's conclusions regarding the economic condition of British slave colonies early in the nineteenth century have been largely vindicated.