Question $2($Mandatory$)(1$ point$)$

Which of the following concepts was NOT credited to Frank and Lillian Gilbreth?

Design of a system that would ease the amount of fatigue a worker experienced by providing them with specific movements to use while completing their jobs

Consideration of working conditions and overall environment in which the workers performed their jobs

Innovations in office furniture leading the way to the study of ergonomics

Identification of six major management roles including forecasting, planning, organizing, commanding, coordinating, and controlling