Which one of the following best expresses the main point of the passage? A. The doctrines of Marxist ideology and Mexican nationalism heavily influenced Mexican painters of Kahlo's generation. B. Kahlo's paintings contain numerous references to the Aztecs as an indigenous Mexican people predating European influence. C. An important element of Kahlo's work is conveyed by symbols that reflect her advocacy of indigenous Mexican culture and Mexican political autonomy. D. The use of Aztec images and symbols in Kahlo's art can be traced to the late nineteenth-century revival of interest in Mexican history and culture. E. Kahlo used Aztec imagery in her paintings primarily in order to foster contemporary appreciation for the authentic art of traditional Mexican culture.