Answer:
d. ignorance and luck are bliss
Step-by-step explanation:
According to the text "Luck" by Mark Twain, it is narrated that Lord Arthur Scoresby who was said to be incompetent and lazy manages to excel in war through sheer luck and gained a high rank in the military.
His luck was so profound that his teacher, the Reverend began to become envious and bitter that a fool like Scoresby would have such high rank as a result of luck while he had to work, and fight himself to his position.
Therefore, the central idea of the text is that ignorance and luck are bliss.