During which era did the Sanxingdui culture exist?

A.

the Neolithic age

B.

the Zhou period

C.

the Xia period

D.

the Shang period

Shang period.  

It was the name of an archaeological site in China. The discovery of it challenged the narrative of the spread of Chinese culture. It was believed that the culture spread from the central planning of the Yellow River. It opened the door to a new conception about multiple centers of innovation that jointly helped to form the culture in China.

answer: the time zones used to be whatever the local authority wanted them to be. one town might have 6am whenever the sun came up and another town had 6am 10 minutes later.  

the trains had a hard time when their orders said to be at a certain point at 6am.  

6am, but who's 6am.  

the railroads got together and set the time zones more or less along the longitude lines across the country.

explanation:

i beleive that d is the right answer