Customer service personnel typically need at least A. a high school diploma. B. a vocational school certificate. C. a community college degree. D. a four-year degree.

A. a high school diploma.

Explanation:

Typically, a Customer service representative's minimum qualification is a high school diploma. They also need on the job training to acquire specific skills required to work in that particular organization. Companies organize classroom-like training to teach the customer service representatives about their products and services.  

Some organizations, such insurance companies and banks, may demand higher qualifications due to the technical aspects of their job.

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