Quindlen links the conclusion to the introduction of her essay with the words "like many improbable ideas, when it works, it's a wonder", which is very close to her claim in the overall text, "America is an Improbable idea", it isn't supposed to work but it does despite all of the differences, specifically racial or ethnic, within it.
Answer:
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Answer:
Error in capitalisation
Explanation:
Doctor should be capitalized only if the person is being addressed as Doctor in place of a name