Robert Frost's poem "Stopping By Woods On A Snowy Evening" seems to talk of an unnamed traveler going through the woods on a snowy evening. And the speaker also reveals how he could not stay longer among the woods for he needs to move on.
On the surface, the poem seems like a simple poem that describes what the traveler/ speaker sees while going through the woods. And even though he'd like to stay longer and revel in the snowy scene, he couldn't. He reveals that he <em>"had promises to keep and miles to go before [he] sleep[s]"</em>. The "<em>miles</em>" could mean the distance he still needs to go. It could also mean 'life' that a person has to live before one 'sleep' forever.
Thus, the inference about the speaker's journey that best supports the poem is option A.