Please help i have limited time! When Theodore Roosevelt was named to the U. S. Civil Service Commission in 1889, he benefitted primarily from his experience as:
-The former Ambassador to the United Kingdom who had seen civil service reform in action there.
-President of the United States who had successfully introduced civil service reform.
-The ranking member of the United Nation's Special Committee on Civil Service.
-A member of the New York State Assembly who had lobbied for civil service reform in his state.

Explanation:

During his term as United States Civil Service Commissioner (1889-1895) the full force of his energy, enthusiasm, and aggressiveness was put to the task of building up the Federal civil service system. He undertook the task of reform with the same honesty and zeal that he showed for all of his endeavors.

seeing as no choices were provided, i'll do my best to answer it from knowledge.

job specialization promotes work ethic to the person doing the job. he/she may be strong in the arms and able to lift things, specializing him/her in a job where you lift and carry.