What Is the Central Issue of the "Insider-Outsider" Problem in the Study

What is the central issue of the "insider-outsider" problem in the study of religion?

A) The secret texts known only to the highest authorities in their respective religions
B) Different points of view from within a religious tradition and outside of it
C) The lack of dialogue between different religious traditions
D) Understanding the divide between the sacred and the profane
E) The ways in which religions mark physical boundaries