Why Is the Scientific Management Approach Seen as Contributing to the Deskilling

Why is the scientific management approach seen as contributing to the deskilling of work?

A) Workers have to learn so many complicated skills for their jobs that they are incapable of learning anything else.
B) The jobs have been broken down into a serious of routinized procedures so they can be learned by anyone.
C) This sort of work leads to increased production,which reduces job satisfaction.
D) The scientific management approach actually leads to workers being underworked,due to the simplicity of the steps involved.