Which of the Following Is NOT a Technique Frederick Taylor

Which of the following is NOT a technique Frederick Taylor used to enhance worker productivity?

A) Study and time each element of the job.
B) Design the most efficient way of doing each part of a job.
C) Place both workers and managers on salary to reduce friction.
D) Supervise workers and managers to make sure they follow procedures and rest only when told to.
E) Allow managers to plan the work to be done.