Final answer:
The key difference in attitudes toward imagination between the poem and the story is that the speaker in the poem believes in the power of imagination, while the narrator in the story dismisses it.
Step-by-step explanation:
When addressing the question of the key difference in attitudes toward imagination in the poem and the story, the correct choice would be option B. The speaker in the poem believes in the power of imagination, while the narrator in the story dismisses it. This distinction is evident as Romanticism, which is highlighted in the context provided, often emphasizes emotion and the sublime, praising the use of imagination as a form of personal power and freedom. Conversely, the lack of value placed on imagination by the narrator in the story suggests a more pragmatic or dismissive stance on the concept.