According to this lesson, what is on characteristic common to followers of islam, christianity, and judaism?

Explain how stock market speculation contributed to the great depression.

What mountains did the first transcontinental railroad cross

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