When there is an extensive labor division than employees specialize in a single task. Thus the correct option is (D).
The concept of the Division of the labor is included in the 14 principles of Henry Fayol which refers to the breakdown of the work of the labor which is to be performed by the specific worker.
The Division of labor leads to the specialization of the specific task. In other words it can be said that the labor or worker becomes the expert in his particular field of job.
Therefore the correct option is (D).
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