The correct answer is: B. ignored the psychological aspects

Taylorism is a theory of scientific management that was developed by Frederick Winslow Taylor in the late 19th century. It is based on the idea that the best way to improve productivity is to break down tasks into their smallest components and then study how each component can be performed most efficiently. Taylorism has been criticized for its dehumanizing approach to work, which views workers as machines rather than human beings.

Option A is incorrect because Taylorism does not view man as an adjunct of man. In fact, Taylorism is based on the idea that workers can be motivated to work more efficiently if they are given clear instructions and are rewarded for their performance.

Option C is incorrect because Taylorism does emphasize human motivation. However, Taylorism does not view motivation as a complex psychological phenomenon. Instead, Taylorism views motivation as a simple matter of providing workers with clear instructions and rewarding them for their performance.

Option D is incorrect because Taylorism does not emphasize only on a limited number of psychological variables. In fact, Taylorism is based on the idea that all aspects of work, including the psychological aspects, can be studied and improved. However, Taylorism does not view the psychological aspects of work as being as important as the physical aspects of work.