Question

which power is dominated the nation building process in Germany

Answer 1

The nation building process in Germany had demonstrated the dominance of the Prussian state power. So, it is very correct to say that Prussia dominated in the nation building process or unification of Germany. German leader Otto von Bismarck led the war for unification of Germany.
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Answer 2

$<b><i> HLo Mate!!!$
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✏PRUSSIAN STATE POWER is dominated the nation building process in germany
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