Answer:
The narrator indicates that Claude, Wilfrid, Irene and Viola are similar to many of their peers. So the right option would be Option A.
Explanation:
Lady Carlotta comes to know about Mrs. Quabarl’s children Claude, Wilfrid and Irene. Mrs. Quabarl’s child Viola is then described by the narrator as “something or other else of a mould equally commonplace among children of that class and type in the twentieth century.” This particular argument concerning Viola indicates that all Quabarl kids have common abilities to other rivals in their social group, or "fairly commonplace of a mold." They aren’t very creative and intelligent. Neither are they hostile to the idea of having a governess nor are they more educated than their peers.