Which nation has a command economy?

Cuba
Norway
South Korea
the United States

Drastic boundary changes can occur for all of the following reasons except for a. a shift in the way a river flows b. the collapse of a government system c. a conflict between two neighboring groups d. one country's decision to sell land to another country select the best answer from the choices provide

Plants in the tundra biomes have had to adapt to live long periods of time without a. cool temperatures b. sunlight c. oxygen d. water

In the figure, polygon abcd is transformed to create polygon a′b′c′d′. this transformation is a by a factor of .