Which type of conflict involves conflict among competing factions within a single nation

The correct answer is D. The artists saw paintings of the temples and buildings. I just took the test

I believe the answer is: Civil war

For example, let's take a look at American civil war. The civil war was initiated by the union army against the confederate army. They both belong in different factions. The union army belong in the faction that wanted to abolish slavery while the confederates belong in the faction that wanted to keep slavery.