Why did it take Italy longer to unify than other European nations such as Great Britain and France?

Because france did no want Prussia to unite the Germans and, as a result, there was The Franco Prussian War and France was defeated. As a result of this war, the German Empire was proclaimed. This had nothing to do with a German inferiority complex and yes, it did take much longer than the UK, France and Spain.

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explanation:

both are true, the congress does have the power to create banks, even if this power is not specifically described in the constitution, since there is nothing restricting it and there is power given to the congress to make "all laws which shall be necessary and proper". maryland was not allowed to tax a branch of the national bank operating there, and the supreme court decided that no state could. both of these topics were discussed in a decision of the mcculloch v. maryland case in 1819.