The adjective here is tall.
We can argue that Dickinson sees death here as nothing but guide to eternity.
In the poem Death is not sinister nor scary, instead its a courteous and patient gentlemen that is there to guide the narrator even though she had not time for it. He accompany's her until its her time and though then things get bit spooky it is worth it as in the fourth stanza she arrives at her destination which is eternity. She relishes that death is not death, but immortality.
the answer is B) the author once felt pride and optimism about the war.
There passage is trying to make it clear/logical about the topic in a straightforward manner
