Answer:
The correct option is C) It would remove the foreboding tone that suggests their possible deaths.
Explanation:
Although synonyms are words which have the same meaning but sometimes using a synonym can change the entire meaning of a sentence or context. Like in the above passage, the word everlasting, is of importance as it shows that these are the final vows being made by the conspirators. Using a synonym instead of this word will lose the forever bonding value of the passage.
I don’t see anything from to chose from
It is necessary because if you don't have a confirmed opinion with textual evidence to back it up you wont have a good argument.