C.) Then my stubborn streak kicked in, and I decided that failure wasn’t an option.
Explanation:
The four sentences talk mainly of the cause and effect of Sora's narrative essay. This part of the essay would be placed in the middle of the essay for it contains the major turning point of her life and the plot of the story. The beginning of the essay may have been about her 'before' life, practicing the game but didn't quite succeed. Then comes the middle part of the narration where she decided to have inner reflection and made up her mind to change her approach. The ending of the essay may deal with the success story or the outcome of the reflection.
The passage provided the best support for placing this part in the middle of her essay. For this part contains the crucial part of the narrative where she changed her perception and approach and the eventual improvement. This claim is supported by the line - Then my stubborn streak kicked in, and I decided that failure wasn’t an option. This particular line provides the transition from the 'before' to 'after' of her narration.
