Answer:
D. all of the above
Explanation:
the answer is all of the above because belief systems vary from God, nature, or harvesting seasons depending on what culture.
The main way in which a desire to build a stronger nation might affect a ruler's decision to become a protestant or a catholic is because he or she would want to "become" the religion that is favored most in the country, as to eliminate any political dissent by the people.
