Since a participle takes the form: verb + -ing, the only word in this sentence which has such a form is B, 'challenging'. 'Puzzle' is a noun, 'crossword' is an adjective, 'created' is a verb.
Answer:
there us nothing to choose from
Shakespeare is alerting the audience to the conflict between Claudius and Hamlet: A
i just took the test
<span>A)noun phrase
Hope this helps.</span>
