Answer:
From the statements mentioned, the one who is completely valid for not be considered is the sentence: "Workers have feelings and free will that can, if they wish, interfere with the quantity and quality of work they perform."
Step-by-step explanation:
Workers have feelings, free will and thoughs like any other human being. But if they agree to work under certain conditions and be rewarded to accomplish them, the most professional treatment will be as a normal employee. If they have feelings and personal thoughs they should save it and keep it aside meanwhile they are working.