The situation that presents the lowest risk of impairing an internal audit activity's independence is when senior management provides feedback on the scope of the internal audit plan. This allows for collaborative planning while still maintaining the internal audit's independence in performing its duties, as the final audit scope decisions remain with the internal audit activity.References: IIA standards on independence, which discuss the need for internal audit to maintain control over audit scopes while considering input from senior management to ensure relevant and effective audit coverage.