The advantages from the division of labor are improved as workers: (1) Are protected by the barriers which limit the international trade. (2) Who each recognize all facets of production gain an enhanced understanding of the whole project. (3) Constantly doing boring tasks become more faithful to their employers. (4) Have raised job security if working conditions are formalized. (5) Gain proficiency in particular skills which yield the higher productivity.
Choose the right answer from the above.