Robert Frost's poem has the structure of a lyric poem. If you think about it, this poem could be put to some music and be sung, just like song lyrics.
The clairvoyant principal always seemed to know when trouble was afoot.
Answer:
they stress how positively Miss Brill views everyone at the park
The answer is C. Because, internal means "inside" and the boy thought that he was evil, he THOUGHT it, it was on the inside. A,B,D are examples of EXternal conflict. Think of it this way: INternal = INside.
Hope it helped. ^-^