2[阅读题]

So I was full of trouble, full as I could be; and didn't know what to do. At last I had an idea; and I says, I'll go and write the letter-- and then see if I can pray. Why, it was astomishing, the way I felt as light as a feather, right off, and my troubels all gone. So I got a piece of paper and a pencil, all glad and excited, and set down and wrote...

Questions:

A. Who does I refer to in the passage?

B. Who am I going to write to?

C. What kind of image is "I"?