The statement that best analyzes how the author develops the central idea across the two passages is: "Alvarez shows how her parents' fears about the dictatorship affected their thoughts and actions even when they lived in the United States." (Option C)
A central idea is the unifying element of a story. It is the dominant idea to which all parts of the story are connected.
The dominant idea was that the fear of dictatorship was already ingrained in them even thought they now lived in America. Hence the correct answer is option C.
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