D. Lack of a clearly designated successor to the imperial throne. During the decline of the empires, the succession of the throne became a contest between family members. Hope this helps.
I'm pretty sure the answer is Ivan Pavlov
Answer:
it is both!!
Explanation: Actually it depends on the way you use it..
more than 12 million Americans were sent into the military, and a similar number toiled in defense-related jobs. Those war jobs seemingly took care of the 17 million unemployed and basically traded debt for unemployment
