Answer:
The correct answer is the last option: Conflict between Protestants and Catholics
Step-by-step explanation:
The violence generated by Protestant and Catholic groups that gave way to burns of places of worship, threats and sabotage in the rituals of worship.
Those states that were in favor of the reform participated, which were Protestants and those that supported the counter-reform, the latter supporting the Catholic Church. First, the war included the German nations that were under the rule of the Germanic Roman Empire. Then it included countries such as: Austria, Denmark, Sweden, France, Spain (Spanish Empire), Portugal (Portuguese Empire) and Switzerland.
Despite this, the Thirty Years War is much more than a conflict between Catholics and Protestants