Which excerpt from the passage best states the authors' claim? "The English were getting richer because Africans were being turned into property." ". . . while that link gave the English a stake in slavery, it also gave the antislavery forces an opportunity." "They created the most effective public relations campaign in history, inventing techniques that we use to this day." ". . . Clarkson and others organized what we would call a boycott of 'the blood-sweetened beverage.'"