Which of the Following Is a Difference Between Primary Research

Which of the following is a difference between primary research and secondary research?

A) Primary research relates more generally to the subject matter of the research question or problem, whereas secondary research is engagement-specific.
B) Primary research involves the collection, analysis, and interpretation of original data, whereas secondary research involves the collection, analysis, and interpretation of data that has been compiled and published by others.
C) Primary research is done by the engaging attorney or client, whereas secondary research is done by the forensic accountant or the expert engaged.
D) Primary research is commonly used in refining a hypothesis, developing critical assumptions, and selecting methodologies, whereas secondary research is commonly used in forming a hypothesis and gathering evidence.