When interpreting a poem, you must observe the rhythm of the stanzas first and identify the symbolism of each of the stanzas. Those first few steps can help identify the overall theme of the poem. It is also important to go through the poem line by line, to look for the center point of the meaning behind.
If i had to guess i would have to say character vs self because he feels guilty about killing that kid, then the other kid accidentally lit the church on fire and hurt or killed his best friend and he has a guilty conscience but it depends on the chapter.
They all seems to have a subject and a verb so D. all the above