A formal request to an authority. or like a request, appeal
B. One of your troop members began to cry.
It doesn't explain why he is crying, and is the most suspenseful, but one could argue it was C, because they could have going the wrong direction, but B is the most suspenseful due to the crying and emotion in it.
Hope this helps, even though I just debated aloud.
Answer: The reason she writes the speech is to encourage thoughtful reflection, while the reason for her essay is to encourage a larger audience to do the same.
This is an essay about the process of writing a speech. This means that the author is sending a message through two different modes of communication. The author explains that the reason she wrote the speech was to congratulate teachers and families, but more importantly, to encourage reflection (<em>"I wondered how best to create an occasion for reflection"</em>). On the other hand, the reason she is writing the essay is to share the experience. In this way, she is hoping she can encourage this reflection in a larger audience.