单项选择题 There is a published paper, titled “Metafictional Strategies in Muriel Sparks’ Novels.” (斯帕克元小说叙事解读）From the title, we may see that the research should be a （）。

单项选择题 Yuan Longping is known as China’s “father of hybrid rice”. His research for hybrid rice is （）。

单项选择题 In an American literature class, the students are assigned the task of carrying out a research to find out the current studies on William Faulkner’s “A Rose for Emily”, and writing a literature review on it. So what kind of research will it be?（）