It's A. He explains in the excerpt how he thinks it was an impurity that made the draught work. Now that he doesn't have the original salt anymore, the draught isn't working.
Answer:
An outsider is someone who doesn't belong to a certain place
Explanation:
I believe the answer would be B.. because they said ticking but for a little while.. it makes you think of like oh.. yeah life is short.... so the answer should be B!! Hope this helps! :)