Based on the excerpt, the statement that best strengthens Feldman´s claim that people are mostly honest is b. Feldman´s payment system was largely successful. His payment system is based on honesty, because he leaves the bagels and a cash basket in which anyone who took a bagel would leave cash, even if people could take a bagel and not pay, or even take money out of the basket, that did not happen. As he says "it was an honor-system commerce scheme, and it worked."
Answer:
The Dursleys didn't have a direct conversation on this matter in the book. But when hagrid came to pick up Harry, and tells him about his parents then Harry mentions that the Dursleys have told him that his parents died in a car crash.
The reason I think they kept him in the dark is pretty obvious, that they hated the magic world, pretty much because of Petunia, as she was jeoulous that her sister (Harry's mother) was a witch and got admitted to Hogwarts and she didn't and they wanted to keep Harry away from that as they didn't want anymore of that "nonsense" and wanted to live a happy ordinary life.
Explanation:
