I would say A, and I think you mentioned Independence, but if you didn't then it is D
The challege Sara faces is that she had to decide whether or not to help the lady she saw on the trail, even though she was too scared.
A as cannot be actually achieved
The first step is to read and identify important words/phrases in the story. Identify first the small and important details then you can see which ones are more important for the summary.
