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

What is one example of trench warfare ?

The christians in jerusalem met in the catacombs for their worship service

In 1944, the supreme court upheld the authority of the u.s. government to order the internment of a minority group in the interest of national security, even though there was no evidence that any members of this group were disloyal to the united states. should the same policy be applied today against u.s. muslims or muslim immigrants? why or why not? are these forms of internment different from native reservations? if so how? if not, why?