单项选择题
A. Perform a full system backup.
B. Follow up with the customer, verifying satisfaction.
C. Ask their manager to contact the customer.
D. Perform a complimentary virus scan.
单项选择题 A customer has a question about the repairs needed for their desktop computer. While asking their question to a technician, the technician receives a personal phone call on their cell phone. Which of the following should the technician do NEXT?（）
单项选择题 A technician is servicing the Human Resource director’s computer which contains payroll software and salary information. Which of the following should the technician do to ensure confidentiality of the payroll information?（）
单项选择题 Which of the following connector types uses a single RCA style connector?（）