Final answer:
Jonas is shocked when he discovers that 'release' in his society is actually an euphemism for euthanasia. This revelation dramatically changes his perspective and leads to pivotal decisions in the story. Option D.
Step-by-step explanation:
When Jonas learns the true meaning of release in the dystopian society portrayed in the novel, his reaction is one of horror and disbelief.
In the context of the story, 'release' is initially understood by the community as a benign transition, but Jonas discovers it actually means the euthanasia of individuals considered unfit or nonconforming within the society.
Jonas is not relieved, excited, or curious about this revelation; rather, he is shocked to learn that 'release' is an act of killing. The enormity of this truth shakes him to his core and fundamentally alters his perception of the society he lives in.
This knowledge motivates Jonas to take actions that will have significant ramifications for himself and others around him.
So option D is the correct answer.