The question asks us to find a set of facts that applies the same principle as in the stimulus. The stimulus tells us that tourists should include Italy in their European vacation itinerary because it is the easiest country to get to know, and getting to know at least one country is necessary to develop the appreciation of the continent. The underlying principle here is to master a whole, one should start with a part that is the easiest to learn/ understand. The correct answer choice (C) applies a similar principle - to study U.S, literature, students should start with Wharton because she is the most accessible of the classical writers. U.S. literature parallels Europe as a whole, and Wharton parallels Italy.
Let me.know if this helps and if you have any further questions.
