Which line from The Importance of Being Earnest shows the difference between city and country living?

The line directly contrasts what people do in town with what they do in the country: in town, one amuses oneself, while in the country, one amuses other people. That explicit comparison shows the difference between city and country living, so the correct choice is “When one is in town one amuses oneself. When one is in the country one amuses other people. It is excessively boring.”

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