Gregor is a traveling salesman
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1) She enjoyed being on the boats and at sea
2) She was a lively woman and a good leader
3) Her piracy made it difficult for others to travel at sea
4) They were surprisingly similar and found common ground between them.
D. because A. and B., although true, are not the main ideas for this paragraph. C. would be true, except explicit means that the paragraph comes right out and says the main idea. This paragraph did not, and so the answer is D.