The thing which the old man says is the world's greatest lie is contained in option D.
This refers to the telling of a story that also involves the recounting of events in their sequence of occurrence.
Hence, we can see that from the complete text, there is a narration of the interaction between the old man and the boy where it is said that "we can pursue our dreams, but we must be willing to make sacrifices along the way"
Therefore, the correct answer is option D
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