Step 1: Understanding coordination in management. 
  
Coordination is the process of ensuring that all parts of an organization work together efficiently to achieve its objectives. Coordination happens at various levels, including between different groups, departments, and between management and workers. Effective coordination is crucial for smooth operations and the achievement of goals. 
Step 2: Analyzing the options. 
  
(A) Between groups: Correct. Coordination between groups is necessary for smooth interaction and to avoid conflicts. 
  
(B) Between departments: Correct. Coordination between departments ensures that different functions of the organization work together effectively. 
  
(C) Between management and workers: Correct. Coordination between management and workers is essential for implementing policies and achieving organizational goals. 
  
(D) All of these: Correct. Coordination occurs at all levels within the organization, between groups, departments, and management and workers. 
Step 3: Conclusion. 
  
Coordination is established at all levels within an organization, including between groups, departments, and management and workers. Thus, the correct answer is (D).