The correct answer is B) intransigence, meaning Ray is extremely stubborn. We know this because his act of leaving the table was really rude. He refused to try the exotic dish and got mad when others continued in persuading him. The answer a)tenacity, meaning Ray is very courageous is not correct because if it was the case, Ray would've tried the exotic dish. The answer c) resolve, suggesting Ray follows through on his morals - is also not correct because morals do not have anything to do with decision making regarding trying out new dishes. The answer d) toughness, suggesting Ray is used to getting his way - is also not correct. Toughness would imply that Ray has a strong will and is somewhat spoiled, but nevertheless it has nothing to do with trying out new dishes.
The main idea of the passage above from Cotton Mather's "The Wonders of the Invisible World" is to justify the outcome of the trials. Thank you for posting your question. I hope this answer helped you. Let me know if you need more help.