Which policy framework did the Tang use to manage relations with neighboring states, and what did it entail?

Which policy framework did the Tang use to manage relations with neighboring states, and what did it entail?

• A. The tribute system; it demanded regular tribute from neighbors in exchange for trade and political legitimacy.
• B. The mandala model; it created concentric spheres of influence with no tribute.
• C. The Silk Road policy; it required military protection in exchange for tribute.
• D. The maritime charter; it provided autonomous rule in exchange for taxes.

Answer: (A)