If a literature student is planning to deliver a speech on the common themes of romantic poetry, he should consult literary scholars’ essays on romantic poetry and a college professor’s essay on romantic poetry. Option C and D.
Both sources mentioned are excelent in order to consult when writing a speech pertaining to the common themes of romantic poetry, since they come from qualified people, who should have solid and broad knowledge of the topic. Thus, the sources are reliable, trusthful and accurate.