The fall of the Zhou dynasty led to A. a period of warfare and chaos.
B. the rise of the Shang dynasty.
C. the start of the dynastic cycle.
D. the growth of new cities.

A: a period of warfare and chaos.

Explanation:

The partition of the Jin state created seven major warring states. After a series of wars among these powerful states, King Zhao of Qin defeated King Nan of Zhou and conquered West Zhou in 256 BCE; his grandson, King Zhuangxiang of Qin, conquered East Zhou, bringing the Zhou Dynasty to an end.

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fair labor standards act

explanation:

2018 means 2018 ce or common era

there have been other eras too including bce, which included way more years.