I personally believe that other opinions should not affect our choices and/or destiny. Or destiny should be determined by our own opinions and choices.
. Sight. Sound. Smell. Taste. Feel
Answer: A. Felt that their efforts were not successful.
Explanation: In the given excerpt from "A Rumor of War" we can see the description of how the soldiers felt discouraged because they discovered that the men they had scorned as peasant guerrillas were a lethal enemy. From the given options, the one that best expresses the fellings of the soldiers about the discovery and the situation, is the corresponding to option A, they felt that their efforts were not successful, and that broke their confidence.
Literary nonfiction is the closest thing to a written document. Take for example you were in the Renaissance era, where new art, and theries, and styles were being developed. You, a young novelist, were to write about what you saw. This written piece that you've written can be used to change history. How? Because you can write about, how it was developed, how it was created, the smaller details that we overlook.
Try and picture yourself now. You see a new historic site being built. And you wrote about it. 200 years into the future an architecture found what you wrote and used it to help change the style of future buildings.
Bottom line... it helps change, impact and inform us of what we weren't able to see.
Make sense?<span />