The correct answer is Option (A).
The importance of unity of command has diminished in today's workplace because of its tendency to be inflexible and inefficient.
Unity of command, a management principle requiring a single direct supervisor, has lost importance in today's workplace due to its inflexibility and inefficiency. Work becomes more complex, requiring collaboration across departments, and organizations adopt more flexible work structures. Employee autonomy and empowerment are also prioritized, requiring flexible structures and multiple supervisors.