C. is a comparative adverb
If we can hear the characters voices we can gauge their emotions. For example, we could tell better if Mrs Hale is trying to hide that "they" presumably John Wright and Mrs Peters didn't get along very well. It appears that Mrs Peters was going to take Mrs Hale some clothes or perhaps Mrs Hale was taking it to Mrs Peters and one of them may have been in jail but hearing the voices could make this clearer who is who.
Answer:
my country do not have water, so my country has a contract with other country stating that they will buy water from them till 202(4)?