The territorial changes that resulted from the peace of Westphalia were that the Netherlands and the Swiss Confederation became independent states.
The peace of Westphalia consisted of a series of treaties that put an end to the European wars of religion. The treaties involved some territorial adjustments and among these, Switzerland became formally independent from the Holy Roman Empire. Furthermore, the Dutch Republic was recognized as an independent state, since its separation from Spain in 1581.
Its C. The netherlands and swiss confederation became independent states
The correct answers are:
1)C The other choices didn't really happen at the time: the Holy Roman Empire ceased to exist (A), Spain separated from the Hapsburg empire later in 1700 with the extinction of the Habsburg Dinasty (B);D is wrong, because through the principle of "cuius regio, eius religio", each state would have his own recognized religion.
2)C The other choices are historically wrong; she was able to strenghten the royal power through her children: the Queen of France, the Queen of Naples and Sicily, the Duchess of Parma, two Holy Roman Emperors, and through her promotion for military, agriculture, commerce development.
3)B Catherine the Great wasn't at all in the shadows of her husband (A), nore did she isolate Russia from the West(C) or limit the royal power (D) through her wide range of reforms, which actually made Russia grow, in territories and culturally speaking, while laying the basis for Russia's Westernization.
4) C Although all choices are true in themselves, Peter the Great had begun to conquer the SOuth territories, in order to get near the Black Sea; Catherine was able to conquer it, thus the correct answer to the question is C.
5) B Austria and Prussia were already part of the Absburg Empire (much before the thirty years' war), as well as the Austrian Netherlands (D), the Baltic countries were never part of this empire (B), of this "Empire" much later.
6)C "Autocratic" and "rapid changes" are the keywords to define Peter the Great's approach of westernization. A and B are totally the oppposite of his MO, D is actually true, but his policies include many other ways and not only the imposition of the French language or customs in court.