The Buckingham and Coffman Hierarchy of customer expectations consists of

a$)$ Accuracy, Availability, Partnership, and Advice

b$)$ Arrangements, Anticipation, Engagement, and Advice

c$)$ Accuracy, Anticipation, Engagement, and Advice

d$)$ Arrangements, Availability, Partnership, and Advice

e$)$ Arrangements, Anticipation, Practice, and Advice