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The answer is "They supply or are supplied from one another, so that indeed the whole island is, as it were, one family."
What is d? the question doesnt make much sense.
The answer is D: studies have suggested that eating a diet fulll of vitamins, minerals, and fiber can help lead longer healthier lives.
personally i think it is "rootless" as wanderers don't really have family roots in a town or any certain town that they live in because the are travellers.
