What was one significant outcome of the Thirty Years' War? O A. European rulers agreed to respect one another's right to choose
their kingdoms' religion.
B. Religious conflicts between Catholics and Protestants increasingly
evolved into bloody wars.
O C. European monarchs agreed to establish constitutions that would
limit their authority.
O D. The Catholic Church agreed to greatly reduce its influence over
European political leaders.

A. European rulers agreed to respect one another's right to choose their kingdoms' religion

Explanation:

The Thirty Years' War was a war of religion that took place in the Holy Roman Empire, which comprises of four kingdoms, between 1618 to 1648, and concluded with the Peace of Westphalia in 1648

The Peace of Westphalia which officially introduced the model of peace being arrived at through a congress of diplomacy and new European political order that is founded on the principle of sovereignty of co-existing states and acceptance of the sovereignty of other states and a states right to decide its fate, principles of which are the founding bases of the present day international law

Therefore, a significant outcome of the Thirty Years' War is the agreement by European rulers to respect the right of one another to decide the religion of their kingdom

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explanation:

the industrial development of cities in the ruhr area in the nineteenth century is described. the research was based on english and german language sources. several factors that shaped growth and paths of the cities were categorized and analyzed. they are locations, resources, traditions, entrepreneurs, and technological developments. locations and resources were the most important among them; other factors may be regarded as consequences from locations and resources. among the cities, bochum, essen, gelsenkirchen, and dortmund had the richest resources and most favorable locations in the transportation network and grew to be the largest cities in the ruhr area near the end of the nineteenth century. riverside location was also a favorable factor for the development, as shown in the development of duisburg on the confluence of rhine and ruhr. resource distribution can explain the rise of textile industry, metallurgical industry, and coal and iron industries, and the northward progression of the mining industry. tradition was an important factor for cities such as krefeld, barmen, elberfeld, solingen, and remscheid, which experienced development based on their traditions through the nineteenth century. various entrepreneurs exerted influences within and beyond the local level over the ruhr area. technological development stimulated the northward progression of the mining industry and the deep connection between the coal and the iron industries.