Which of the Following Is True for Self-Service Retailing

Which of the following is true for self-service retailing?

A) They carry more shopping goods and services such as credit and merchandise-return privileges.
B) This service model is favored by discount stores and customers who want to save money.
C) It results in high staffing costs compared to other forms of retailing.
D) Salespeople are ready to assist in every phase of the "locate-compare-select" process.
E) Customers need more information and assistance than in other forms of retailing.