In what type of purchase would one person most likely assume all or most buying center roles?

__________ a term that means persons are assured all fundamental rights given through the constitution which includes fairness, justice and liberty for all

Sandy's Stores is a small chain of grocery stores located in a few neighboring towns. The stores have always been largely self-service, but the company is considering making a switch to full-service stores

Offer reasons why Sandy's should stick with its current system.