When Creating the Index,which of These Will Probably NOT Be

Multiple Choice

When creating the index,which of these will probably NOT be a place to find terms to include in the index:

A) The set of commands in the user interface (like open file,modify,etc. )
B) The set of user interface design standards (like aesthetics,layout,consistency,etc. )
C) The set of major concepts in the system (like in the Tune Source example of artist,tune,music genre,etc. )
D) The set of business tasks (like ordering,returns,adjustments,etc. )
E) The set of synonyms for other sets (like 'quit','stop','end' for 'exit' or 'erase' for 'delete')