Final answer:
The sentence reveals that Mrs. De Ropp serves as a model of respectability that the protagonist detests.
Step-by-step explanation:
The sentence reveals that Mrs. De Ropp is a character who serves as a model of respectability that the protagonist detests. The phrase 'ground plan' suggests that she is the foundation or prototype for what is considered respectable. By stating that the protagonist detests all respectability based on Mrs. De Ropp, it implies a strong negative sentiment towards her and the values she represents.
Learn more about Mrs. De Ropp's character and values