The Unity-Of-Command Principle States Which of the Following

The unity-of-command principle states which of the following?

A) Managers should provide direction to their employees in a unified fashion.
B) Managers should limit their oversight to a maximum of 12 employees.
C) An individual should be directly responsible to only one supervisor.
D) Employees should report directly to two supervisors to maintain task balance.
E) Managers should oversee 1 - 4 employees on average.