Which of the following best characterizes the "contradiction" that the author refers to? A. The subjects of Harper's study enjoyed solitude, and yet as travelers they were often among people. B. Nineteenth-century travel writers used their own names, but nineteenth-century novelists used pseudonyms. C. Women's movements in the nineteenth-century were not very radical in comparison with those of the twentieth-century. D. Nineteenth-century female novelists thought they were breaking boundaries, but it was the nineteenth-century women who traveled alone who were really doing so. E. While traveling alone in the nineteenth-century was considered a radical act for a woman, the nineteenth-century solitary female travelers generally held conventional views.