Writing and bronze tools emerged during the following period of Chinese history: The Song era.
The Xia era.
The Zhou era.
The Shang era.
The Han era.

Pretty sure its the Shang and Zhou Dynasty

Explanation:

all persons entering into t

he employment of the compan

y, are considered as engaged

for twelve months, and those who leave

sooner, or do not comply with all these

regulations, will not be entitled

to a regular discharge.  

go up to your profile picture in the top right hand. click on it. then click on edit profile. there you shall see delete account