💡 Detailed Explanation
The man, likely a superior, is complimenting the proposal using the idiom '骨がある' (hone ga aru), which means it is solid, well-thought-out, and has substance. The correct response is to accept the compliment humbly and professionally. Answer 1, 'Thank you very much. I will do my best to meet your expectations,' is a perfect example of this. Answer 2, 'I'm sorry, did it need more fleshing out?' misunderstands the compliment as criticism, thinking 'bone' means it's just a skeleton. Answer 3, 'Bones? I should be getting enough calcium,' is a literal and nonsensical misinterpretation.