Exit the narrower your research question,
a. the deeper your research can go.
b. the more difficult it is to research.
c. the broader the parameters of your research.
d. the fewer the topics you can cover.

none because there is no words that describe a noun and give a mood

- "the basic difference between keywords and subjects is that subjects (or "subject headings") have been predetermined, while keywords have not. a keyword is an easy place to start because you can use any word that seems to fit your search; this is called "natural language" searching."

past mark brainest if can