Final answer:
Carnes means that he is obligated to honor his commitment, indicating that he cannot break his promise even if he has regrets or wishes to act differently. Option C
Step-by-step explanation:
When Carnes says "Too bad. Still and all I can't go back on my word," he is expressing that despite any regret or desire to do otherwise, he is bound by his promise and is unable to break his commitment. The phrase suggests a sense of responsibility and honor underlying his decision.
Thus, the most appropriate interpretation of Carnes' statement in this context is that he cannot break his promise (c), indicating his commitment to keeping his word even if it goes against what he now wishes he could do. Option C