In my ninth-grade writing class last year, I met a cowboy who saved his town, a strict father who demanded his son earn straight A's, and a modern-day Juliet who died of heartbreak after her parents rejected the love of her young life.
以下哪个选项正确反映了句子中“a strict father who demanded his son earn straight A's”部分的内部层次结构(用方括号表示嵌套关系)?