Hi GaYoon! 

Yes, D) rather is definitely the correct answer. Great catch! I must've had a brain lapse (or something), but D) is for sure the right answer. A lot of students have trouble with transitions like 'rather,' but it seems like you're pretty good with them! That's a big advantage for you come test time. I'll note the correction and please let me know if you find other explanations questionable. 

Option D is correct because "rather" is a precise transitional word that provides an alternative to the idea presented in the previous statement. The text initially suggests that the protagonist's actions are driven by external circumstances beyond his control. However, "rather" introduces an alternative explanation, clarifying that his actions actually stem from deep-seated personal insecurities and a profound fear of failure. 

Keep moving forward! You got this! 

Jin Teacher