This is a question about the passage below (The Tree of Man by Patrick White).

[Q] Which two adjectives best describe the mother of Stan Parker?

A. tidy, accepted
B. lonely, successful
C. self-assured, literary
D. solitary, uncertain

-------------------------------------------
The name of this man was Stan Parker.
While he was still unborn his mother had thought she would like to call him Ebenezer, but he was spared this because his father, an obscene man, with hair on his stomach, had laughed. So the mother thought no more about it. She was a humourless and rather frightened woman. When the time came she called her boy Stanley, which was, after all, a respectable sort of a name. She remembered also the explorer, of whom she had read.
There were many things to which she did not have the answers. For this reason she did not go much with the other women, who knew, most of them, most things, and if they didn’t, it wasn’t worth knowing. So the mother of Stan Parker was alone. She continued to read, the Tennyson with brass hasps and the violets pressed inside, the spotted Shakespeare that had been in a flood, and the collection of catalogues, annuals, recipe books, and a cyclopaedia and gazetteer that composed her distinguished and protective reading. She read, and she practised neatness, as if she might tidy things up that way; only time and moth destroyed her efforts, and the souls of human beings, which will burst out of any box they are put inside.
-------------------------------------------

I guess the answer is D, for I don't get positive impressions like accepted(A), successful(B) or self-assured(C). But I might/should miss something and be wrong.

Thank you for reading till the end.
I'd really appreciate it if you could answer it.