The question tests the understanding of polite language used when offering advice. The correct answer is 'A' because it conveys a similar meaning of willingly giving advice with pleasure. Option B is incorrect because 'enjoy' implies a personal liking but doesn't necessarily convey the willingness to help as 'pleasure' does. Option C is incorrect because 'force' is too strong and impolite. Option D is incorrect because 'feel obligated' implies a sense of duty rather than willingness and pleasure.