What must the Executive Board and local union officers avoid working in conflict with?

The focus of the question is on the importance of collaboration and alignment within the organizational structure of a union, specifically concerning the roles of the Executive Board and local union officers. The correct answer highlights that the Executive Board and local union officers must avoid working in conflict with the Business Manager. This is crucial because the Business Manager typically serves as the key representative and operational leader of the union, responsible for implementing policies and management decisions.

When there is a conflict between the Executive Board, local union officers, and the Business Manager, it can lead to disorganization, inefficiencies, and a breakdown in communication. This undermines the ability of the union to effectively support its members and achieve its goals. A harmonious relationship and cooperative approach between these roles are essential for promoting unity, ensuring effective governance, and maintaining a strong focus on the members' interests.

The other options, while important in their own contexts, do not directly pertain to the primary consideration of ensuring that the union operates smoothly with a unified leadership front that supports the Business Manager's role.