Concept:Analyze each course of action to see if it directly follows from the given statement.Explanation:Course I follows because the statement clearly shows that the centralized mobile communication group reduced confusion and improved coordination among residents.Course II follows because some residents complained that excessive notifications disturbed their routines, so setting clear guidelines on notification frequency and relevance is a practical corrective step.Course III does not follow because the statement never suggests banning complaints in physical community meetings or eliminating offline interaction.Thus, only courses I and II are logically supported.Answer:Only I and II follow.Correct option: C.