Answer:
B. "Cold comforts set between us, things to share."
Explanation:
The correct answers, which is letter 'b', best describes their current emotional situation between son and mother, the 'clean water' for instance, represents something for them to be happy about, nevertheless, the "cold comforts" is a little reward for what they both suffer. The first option, letter A, refers to the idea of him wishing for, 'soldering' literally means to join two pieces of metal together, so this allows to understand that this was not a connection, but a wish. As for the last two options, means that even at his mother’s death, the son keeps alive this special relationship in an ambiance of sadness.