The balkans were called the "powder keg of europe" because:
three large empires wanted control of the region.
there were many different competing ethnic groups.
there were significant populations of catholics, eastern orthodox christians, muslims, and jews.
all of the choices are correct.

d. japan's attack on pearl harbor

the process of industrialization is called a revolution because

c. mass = force / accellaration

step-by-step explanation:

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explanation:

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