Answer:
c) We are isolated
Step-by-step explanation:
a) is not correct. Dickenson means Switzerland and Swiss lives as a metaphor, not a literal living in that country.
b) is not the right answer. There are no mentions of holes or lives having any cracks in them.
c) is the right answer. Dickenson refers to lives as "still" and "cold", meaning proper and organized, but yet behind the Alps that are "guards", away from the other people (Italy). All these descriptions all paint the picture of isolation, separated from others, alone and distant.
d) is not the right answer. Nothing talks about any sense of neutrality, so Dickenson is not referring to this.