If security guard requirements are basically high school diploma or GED, what is the best reason most security guards have two or four years of college?

Although a high school diploma or GED may meet the basic hiring requirement, college can build skills that help guards do their work more effectively. It can also broaden their understanding of people and safety, benefiting both the guard and the agency. This makes A, the choice about skills and a wider perspective, the best reason; higher pay or prestige alone does not explain the educational benefit.

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