Answer: 3.B. question 4. answer D. question 5. answer B.
queston 6. answer A.
Explanation:
3. Prussia fought with Austria because both of them had conquered Denmark which was the result of the Austro-Prussian war.
7. the differences were that Germany's unification was more simpler than Italy's. because Germany had a custom union and a confederation parliament. and because of this it brought economic and political unity. unlike for Italy's unification it took more longer than of Germany.
8. there were some similarities in Germany's and Italy's unification. Napolean Bonaparte indirectly encouraged the unification and nationalism of the two countries. Germany and Italy were divided into small states. and because of that the two countries lacked unity. and both used military force to unify different states of their own which intern did not build up nationalism.