He could not convince the Union army. He did not find it completely necessary.
The correct answers are B and C.
In order to help the reader understand the meaning of different objects in the story and what they represent, the author will have to present this object repeatedly in the story.
This repetition will caugh the reader's attention, making him understand that this object has special meaning to the story.
At the same time, the writer will have to give this object special emphasis. Just mentioning it several times will not be enough for the reader to understand its meaning. The author must give this object its space and elaborate on it so that it can really stand out.
