Which statement about the thirty years' war is true?

The right answer is the letter C

Explanation:

With the definitive end of the power of the Holy Roman-Germanic Empire, the small Germanic nations were devastated economically. The war had been too cruel with its participants in particular the German region which had been the main battlefield; European civilization had reached one of its lowest levels on the civic and human issues.  The states of Germany had to pay for the damage caused by the battles, these states were defeated, ruined, and devastated by the thirty years of war. The main battlefields of the intermittent conflicts were in the cities and principalities that today form Germany, these suffered serious damage in their cities and fields.

the answer is option a.