C, the text includes good information about the eiffel tower so it wouldn’t be b because it isn’t persuading anything. it also isn’t a story.
C. is the correct answer.
C is the only answer choice that refers to the future ("a sign, he said, a sign"). The rest of the answers refer to things happening in the present in the story, with almost no reference to the future of the plot.
Using the answer choices provided, D would be the most feasible one in this case.