Which one of the following concepts are not associated with scientific management?
1. Rule of Thumb
2. Mental Revolution
3. Unity of-Command
4. Time and Motion Study
5. Differential Piece Rate System
A. Both 1 and 2
B. Both 1 and 3
C. 3, 4 and 5
D. 1, 2, 3 and 5
Answer: Option B

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