The most powerful state to emerge in mainland southeast asia before the sixteenth century was

The correct answer is Angkor. Angkor is known to be the capital city of the empire Khmer. This is also known and recognized as Yasodharapura by which it flourished in the 9th until the 15th century. It is considered to be one of the most important archaeological sites found in South east asia.

regulate taxes

explanation:

the main inference that can be drawn from jean jacques rousseau's book the social contract is: a. people can enjoy civil and physical freedom, even if it sometimes harms society.