Between 1930 and 1940, Oklahoma's population A. decreased by 60,000.
B. increased slightly.
C. decreased by one-half.
D. increased by about 60,000.

A

Explanation:

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explanation:

japan participated in world war i from 1914 to 1918 in an alliance with entente powers and played an important role in securing the sea lanes in the west pacific and indian oceans against the imperial german navy as the member of the allies.

in 1897, pershing became a tactical officer at west point, and that's where he was given the nickname "black jack." pershing's first name is "john," for which "jack" is a nickname, and he was a white man who commanded black troops. hence "black jack".