A large retail organization previously divided work among its four employee$-$benefits staff into distinct specializations. One person answered all questions about superannuation $($pension plans$),$ another answered all questions about various forms of paid time off $($e$.$g$.$ vacations$),$ and so on$.$ These jobs were recently restructured so that each person answers all questions for people in a particular geographic area. For example, one staff member is responsible for all employee$-$benefits inquiries from anyone in a particular geographic region. This job restructuring is an example of:

Question $3$ options:

job specialization

job rotation

self$-$leadership

scientific management

job enrichment