Option 1 -> (D), (B), (C), (A) - Creates a disjointed sequence where "comes back home" appears before establishing she left as a child.
Option 2 -> (A), (C), (B), (D) - Begins with "who" without a subject, and places the introduction at the end illogically.
Option 3 -> (A), (C), (D), (B) - Also starts with "who" without context and awkwardly inserts the story description in the middle.
Option 4 -> (D), (A), (C), (B) - Properly introduces the story first, then describes the girl losing her toy when leaving home as a child, and concludes with her returning as an adult.
Hence, Option 4: (D), (A), (C), (B) -> This creates the logical sentence: "This is a nostalgic story about a girl who loses her favourite toy when she leaves home as a young child and then comes back home to find it as an adult after 17 years." The sequence follows proper narrative structure with introduction, event, and conclusion. -> correct