Final answer:
Germany was the country that was weakened to the point of existing in name only at the end of the Thirty Years' War.
Correct option is D.
Step-by-step explanation:
The country that was weakened to the point of existing in name only at the end of the Thirty Years' War was Germany.
The Thirty Years' War was a conflict that took place from 1618 to 1648 primarily within the Holy Roman Empire. It involved battles between Catholic and Protestant states and attracted the involvement of other European countries. Germany suffered greatly during this war, with its people enduring destruction and devastation caused by armies of mercenaries. France, in particular, emerged as the dominant power in western Europe as a result of the war.
Germany was the country severely weakened by the Thirty Years' War, continuing to exist in name only after the conflict.
At the end of the Thirty Years' War, the country that was so weakened that it continued to exist in name only was Germany (Option D). Most of the conflict took place within the German lands of the Holy Roman Empire, which resulted in massive destruction and depopulation in the area. Although the Peace of Westphalia in 1648 recognized the independence of the nearly one thousand entities that comprised the Holy Roman Empire, the region's power and cohesion were critically diminished, leading to a fragmented and weakened Germany.