The correct answer is D. All of the above.
The principle of balance states that there should be a balance between the activities, authority and responsibility, and standardization of procedures and flexibility in order to achieve efficiency and effectiveness.
A balance between the activities means that there should be a good mix of different types of activities, such as routine tasks, creative tasks, and problem-solving tasks. This will help to keep employees engaged and motivated.
A balance between authority and responsibility means that employees should have the authority to make decisions and take action, but they should also be held accountable for their decisions. This will help to ensure that employees are responsible and that they take their work seriously.
A balance between standardization of procedures and flexibility means that there should be some standard procedures in place, but there should also be some flexibility to allow for changes and innovation. This will help to ensure that employees are efficient and that they are able to adapt to changes in the environment.
By following the principle of balance, organizations can achieve efficiency and effectiveness.