The answer to your question is d :)
Prior to the existence of the nation-state, Europe was comprised of several multi ethnic empires, the largest and most powerful of which was the Holy Roman Empire. Territory changed hands often. Many times, this took place because of marriage or as a result of war.
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Geologists classify Wave Rock as a flared slope, a concave bedrock surface at the base of the inselberg. Its odd shape comes from two main processes: weathering and erosion. Chemical weathering of the softer rock at the base by groundwater did most of the work, while erosion from wind and rain added further touches.
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