Is there anyway to emphasize that question you're asking?
I believe the correct is the third option. It is important to preview sources before using them in your research because it reveals deeper concepts. Reading deeply the sources would allow you to have a deeper understanding of the sources and determine which parts of the sources are useful to your research.
The excerpt that shows the low self-esteem of the
soldiers and their belief that being a soldier has nothing to do with bravery
from Ernest Hemingway's "In Another Country," is the sentence “ The
three with the medals were like hunting-hawks; and I was not a hawk, although I
might seem a hawk to those who had never hunted; they, the three, knew better
and so we drifted apart.”
In the exposition the plot, background, and characters are introduced.
