Exploratory Research Can Be Explained by Which of the Following

Exploratory research can be explained by which of the following statements:

A) Focusing upon the issue of what is happening, or how much of it has happened, rather than why it is happening.
B) Takes place where there is little or no prior knowledge of a phenomenon.
C) A type of research that attempts to gain some familiarity with the appropriate concepts and looks for patterns or ideas without any preconceived ideas or explanation.
D) Both B & C