All of the Following Are Mentioned in the Text as Indicators

All of the following are mentioned in the text as indicators that should be used to evaluate interviewers on the quality of interviewing EXCEPT:

A) the answers to unstructured questions are summarized.
B) for structured questions, item nonresponse occurs infrequently.
C) the recorded data are legible.
D) all instructions, including skip patterns, are followed.
E) A and B