D. Seniority refers to the length of time a person had held a job.
What is seniority?
Job Seniority refers to a longer period of service or experience that attracts higher rank, pay, and benefits in a job.
Union, Lobbying, or Professional does not refer to the length of time spent on a job.
Thus, D. Seniority refers to the length of time a person had held a job.
Learn more about Seniority in a job at https://brainly.com/question/8355881
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