Over the course of the eastern zhou and then the warring states period a. a large number of feudal states governed by noble lords evolved into a handful of centralized monarchies ruled by kings. b. china was repeatedly invaded by the mongols, at least until the zhou kings built the great wall. c. following advice in the art of war, the zhou kingdom was able to reunify the realm under one centralized monarchy by fielding the most powerful army and proclaiming the mandate of heaven. d. warfare caused the fragmentation of the chinese cultural realm into an ever larger number of feudal domains.

The correct answer is A. A large number of feudal states governed by noble lords evolved into a handful of centralized monarchies ruled by kings.

Explanation:

The Eastern Zhou (770-256 BCE) and the Warring States Period (475-221 BCE) refer to an era of Chinese history that was marked by disintegration of the ancient Zhou dynasty, which had ruled China by several centuries before it decayed starting in the 5th century BCE, and following the partition of the Jin state, a series of states disputed control over China during the next two centuries. The most important of these were the Seven Warring States, which rose as a result of a series of unifications where a large number of feudal small states governed by noble lords evolved into a handful of centralized monarchies ruled by kings by the 4th century. Eventually, the Qing kingdom grew more powerful than the neighboring kingdoms, and between 247 and 221 BCE, the Qing conquered them all, ending the Warring States period and unifying China under its rule.

the border between arizona and new mexico is a thin, black line; this indicates a state boundary.

its correct: it's a thin line, and it's a state boundary, correct