To prepare the readers for the end of the story (A)
Answer:
A thesis statement focuses your ideas into one or two sentences. It should present the topic of your paper and also make a comment about your position in relation to the topic. Your thesis statement should tell your reader what the paper is about and also help guide your writing and keep your argument focused.
That time when you fought a tiger with a arm behind your back while blindfolded and won.
I want to say (B) is your answer.
Hope this helps.