Answer:C.An unwanted repetitive pattern
Explanation:
What is an unwanted repetitive pattern?
This is a pattern that occurs when people don't see eye to eye often about one issue which usually fuels a conflict between them all the time this issue is raised.
It leads to disagreement all the time where by one person responds negatively because the other one said something that they don't agree with and it goes on every time when such situation arises. It brings negativity to their life which may affect the pleasant atmosphere.