A Customer Who Has Many Dealings with His/her Bank Over

Multiple Choice

A customer who has many dealings with his/her bank over a year has many encounters with them.All of the following events may violate his/her respect if the customer encountered it except:

A) long waiting time to be served
B) unfriendly customer service personnel
C) bank staff's unreliability in returning phone calls
D) preferential treatment given to another customer
E) lack of product knowledge of the staff when asking about particular services