Final answer:
Sophie's father took extreme, possibly violent measures to prevent her from being kidnapped, suggesting that he may have resorted to murder as a form of protection.
Step-by-step explanation:
In addressing the question regarding what Sophie's dad did to prevent her from being kidnapped, it's clear from the provided references that her father took extreme measures to ensure his daughter's safety. While specific details are not given within these snippets, they suggest actions that involved serious consequences for those who threatened her.
The reference to "a paroxysm of grief" and being "stunned with the horror of this revelation" indicates a dark and severe resolution to the threat, possibly implying that Sophie's father resorted to violence or even murder to protect her.
It's evident that Sophie's well-being and protection were of utmost importance to her father, leading him to take uncompromising steps to secure her safety, regardless of the ethical or moral implications such actions might carry. This protective parental instinct is underscored by the overall tone of the references provided.