The best summary of the excerpt is option C. MacGregor believes the antique tea set to be a symbol of British history. He includes a quotation from a historian to support his point.
The text is about the culture of the British who are fond of tea and hence becomes their ways of life. This is what the writer is trying to tell the rest of the world. That is, tea is essential in the history of the British.
Therefore, the correct answer is option C. MacGregor believes the antique tea set to be a symbol of British history. He includes a quotation from a historian to support his point.
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