The correct answer is there was no reason.
There was actually a reason but it was never stated publicly and it was because of all the affairs that occurred between them. They went to France to live outside of it all and not deal with repercussions and save their marriage.
Symere woods. July 31, 1994
No choices have been provided
however there were two contesting groups in Roman republic which is the plebeians and the patricians. The patricians were the wealthy and had dominated the kingdom before the republics day. the plebeians were the skilled and the non-skilled common man.
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I would say the answer is B. Conflict led to its split into two separate kingdoms. Sorry if I am wrong, but otherwise I hope I was helpful for you.
World War One, World War Two, Woodrow Wilson, Franklin D. ... focuses on the comparison of events that led to a similar situation in WWI and WWII that ... of Europe declared war against each other.