The detail that best develops the idea that having time in solitude will result in happiness is paragraph 11. That is option D.
Solitude is defined as the state of being left alone to one's own self.
From the statements given in the question above, the one that best develops the idea that having time in solitude will result in happiness is "Wouldn't it be perfect to get up every morning for weeks and feel that you belong to yourself and to nobody else?"
Learn more about happiness here:
https://brainly.com/question/7292814
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