As the poem 'The Road Not Taken' broadly emphasizes the role of decision-making in one's life. When one has many choices, it is very crucial to make the right choice. Right decision will be beneficial to the individual in the long term. ... The poet or traveller sighs when he refers to the decision he has made.
The answer is B. "Frightened."
You can draw the conclusion that the author is trying to communicate a frightened tone by the diction of the stanza. The following line of the text states: "In the silence of the night, How we shiver with affright..." This is a very telling detail that supports the idea that the author's tone was meant to be frightening.