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Which of the following was not an underlying cause of WWI?

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

How are farmers that use no plow farming methods able to improve air quality for the people around the fram

In a command economy, the majority of goods and services are provided by the