Final answer:
The theme is developed through the characters in option D. Jimmy and Girlie take active steps to find and support their mother.
Step-by-step explanation:
The theme of the passage is developed through the characters in option D. Jimmy and Girlie develop the theme when they search for their mother after her arrest. They take active steps, such as going to a lawyer and standing outside a prison, to find and support their mother. This demonstrates their commitment to family and their willingness to face challenges to protect their loved ones.