Somehow, the journalist whose work you may have read on the study guide continues to have a job. You're giving him a much-needed tutoring session in writing. Explain what needs to be different about this diagram so that it means "experts are confused as to why Cassowary birds are on the rampage" rather than "world-class puzzle solvers remain recurring targets of Cassowary birds".
a. Change Attacks-VBZ (verb) to Attacks-NN (Noun).
b. Change puzzle-NN (noun) to puzzle-VB (Verb) and attacks-VBZ (verb) to attacks-NN (noun).
c. This is a trick question.
d. Change Puzzle-NN (noun) to Puzzle-VB (Verb).