The correct answer is A. The student could show how each author's message about the theme is different. By doing so, the student will be analyzing how the same theme is used in contrasting ways. B is incorrect because the point of comparison is to work with one theme across two different works, rather than several themes. C is incorrect because the comparison of characters and the analysis of their development doesn't necessarily concern themes. D is incorrect because a culturally specific theme may not be present.