The study relating to the movement of a machine operator and his machinewhile performing the job is called__________.

The study relating to the movement of a machine operator and his machi

1.	The study relating to the movement of a machine operator and his machinewhile performing the job is called__________.
A.	time study.
B.	work study.
C.	motion study.
D.	fatigue study.
Answer» D. fatigue study.