Need now during which era did the sanxingdui culture exist? the neolithic age the zhou period the xia period the shang period

Historians are concerned with the accuracy of their writings and readings but are also aware of the inability of authors to know every angle of every story biases, perspectives, beliefs, and a variety of other differences history being told by one person at a time no one being totally accurate, as hard as we try really need on this, and you^^

List two inventions that were invented in the united states before the american civil war

In the supreme court’s decision in korematsu v. united states, the court said that korematsu