You Pick Up a Book Called the Australia in the Penal

You pick up a book called the Australia in the Penal Colony Years. When reading it, you notice that the author really only discusses the lives and ideas of five individuals based upon their diaries. The book is very micro-level. It only tells about the particular people with no generalization or integrating themes. This book illustrates which problem with secondary sources?

A) Historians often use vague concepts with inconsistent definitions to organize the primary sources they read.
B) Historians select a tiny fraction of the mass of information they read, but the selection process is largely unseen and unknown.
C) Historians often have an individualistic bias and tend to focus on actions of the specific individuals revealed in primary sources.
D) Historians, especially those who write in a narrative form, separate out significant from trivial information, but rarely make their social theories explicit.
E) Historians are influenced by various "schools" of historiography.