Which of the Following Is Gantt's Approach to Training?​

Which of the following is Gantt's approach to training?​

A) ​A reward for a teacher if a pupil is successful
B) ​A scientific investigation in detail of each piece of work
C) ​Determination of the longest time in which a piece of work can be done
D) A ​reward for a pupil even if he or she is unsuccessful
E) ​Determination of the least effective method in which a piece of work can be done