Based on what is known about China's Ming Dynasty tribute system, the most accurate inference is:
- China demonstrated that it was a powerful country.
The tribute system was a way for China to showcase its dominance and influence over neighboring countries, as those countries would pay tribute to acknowledge China's superiority. The other statements are not accurate: countries did offer tribute (though the system had its challenges), China sought tributes from a range of countries beyond just its immediate borders, and the concept of tribute systems had been used in various forms throughout history, not something entirely new.