In a Program Evaluation, Qualitative Data Such as Audiotapes of Personal

In a program evaluation, qualitative data such as audiotapes of personal interviews must be analyzed. A first step is often to eliminate "noise" prior to transcribing them. To what does the term "noise" generally refer?

A) static created by the recording device
B) background conversations that may have been accidentally picked up
C) the body language of people who provide research data
D) interchanges not relevant to the data being sought, such as exchange of greetings or other social amenities