Which most accurately describes the "mandate of heaven"? the zhou dynasty’s justification for its leadership a new religion the philosophy of confucius a holy book

When conducting research for forming a hypothesis, which practice should historians follow?

What was the historic border between the united states and mexico?

One drawback of voluntary trade is that it a.requires two groups to use a common language b.can make one group dependent upon another for necessary goods c.doesn't occur unless there is a shortage of goods for at least one group d.forces groups to rely on themselves to produce all the goods they need