I think the answer A. is a good one. As long as you have the evidence to prove it, it would be A.
Answer:
The mother is telling her son to persevere and keep going, like she did. "So, boy, don't you turn back." shows how she encourages him to move forward, and "For I'se still goin', honey, I'se still climbin" shows how she wants him to follow in her footsteps, because she is persevering.
Fun Fact:
My class also did this at online school last week.
1. To Reduce (E). Make less; decrease.
2. Exorbitant (D). Much more than reasonable.
3. To cull (B). To collect something from different places.
4. Showcase (A).Good qualities of someone or something.
5. To eliminate (C).To get rid of something that is not wanted or needed.
One reason for making a new outline of your work while revising is to make sure that all the new and necessary information you need to edit and put in (or maybe delete as well) are included in your work. This is to minimize wasting of the time and leaving out important details in the revision.