Hi, NeverMissing,
Thanks for the good question and your analysis. The correct answer for question hinges on a careful analysis of the interplay of the sufficient and necessary conditions and then an appreciation of the nuances of the question itself. In fact, the choice of language here is both careful and deliberate. Let's break this question down.
- World Literature Interpreted within Writer's National Tradition & Interpreted within Other National Traditions
- Used in one of Three Ways Interpreted within a National Tradition
Let's consider answer choice (E). What do we know about a work that affects the development of only one national tradition? Note that all three of the ways that a work could be interpreted within a national tradition involve "development" in some sense, whether literal "development of their own tradition," something to be "avoided" (prima facie a "development"), or as a "refinement" (also a "development"). Thus in any sense in which a work could be considered "interpreted within a national tradition," it has in some sense contributed to "development." Further, we know from the premises that for a work to be part of world literature it is necessary that it be interpreted within multiple national traditions. Thus, we can conclude that given that a work has affected the development of but one national tradition it is also interpreted in only one national tradition. Thus it cannot meet the necessary prerequisite of world literature.
Now, one could argue that the syntax of (2) would not lead to the double arrow above but only to a unidirectional conditional with the three development methods as independent sufficient conditions to guarantee that a work be interpreted within a national tradition. The nuance of the sentence ("counts as [...] if [...] at least one of three ways") led me to use a double arrow here. However, one could argue that there could be some other, fourth, sufficient condition, not stated, that does not involve "development," that would be independently sufficient to guarantee that a work be considered "interpreted" within a national tradition. One could thus argue hypothetically that this stimulus does not rule out such a possibility.
However, at this point we should return to the question task itself, which asks us to find which statement is "most strongly supported" by the information in the stimulus. I hope with the benefit of this further analysis we might agree that there is in fact substantial support for answer choice (E) and certainly
more support for (E) than for any of the alternatives. Thus, (E) satisfies this particular question and is the credited response.
I hope this helps!