The quote "money is a strong weapon, and its long arm reaches over miles and miles of land and water" suggests that the narrator is aware of the power and influence that money can have in affecting situations and people's lives. Given this context, the most fitting implication about the narrator would be:
C. She fears Bernard may use his money against her.
This option aligns with the idea that the narrator recognizes the potential threats that wealth can pose, particularly if wielded by someone with intentions that might conflict with her own.