Which of the Following Statements Regarding the Traditional Manufacturing Environment

Which of the following statements regarding the traditional manufacturing environment is not true?

A) Machines are often put into "manufacturing cells" whereby dissimilar machines are grouped together.
B) Raw material is "pushed" to the next production area in anticipation of customer demand.
C) Manufacturers often have raw material, work in process, and finished goods inventory on hand.
D) Buffers of inventory may result in workers being less efficient.