Final answer:
Eo's final words are 'Bye, Darrow,' expressing her love and belief in the protagonist's ability to bring about change.
Step-by-step explanation:
Based on the given options, Eo's final words are 'Bye, Darrow.' This phrase is commonly associated with the character Eo in Pierce Brown's novel Red Rising.
Eo says these words to the protagonist, Darrow, before her death, symbolizing her love for him and her belief in his ability to bring about change.