Answer:
Big Bang, Formation of universe, galaxy's, planets
Explanation:
The Open Door Policy is a name in foreign affairs preeminent
used to stand to the US policy set up in the late nineteenth century and the beginning
of twentieth century, as articulated in Secretary of State John Feed's Open Door
Note, dated September 6, 1899 and exchange to the significant European forces.
The answer is ''Conversion of forests to grazing lands.'' So (C)
It had smaller population around 2 million
