What Is One of the Major Advantages of Using Qualitative

What is one of the major advantages of using qualitative historical research methods compared to other qualitative forms of data collection?

A) It is nonreactive.
B) Data collection allows the researcher to formulate a deep understanding of a group and its members.
C) It is limited by the availability and quality of documents and data.
D) Using existing sources frees up the immense amount of time that the data collection procedure can take.
E) It does not involve a sampling phase.