The following text is adapted from Louisa May Alcott's 1869 novel An Old-Fashioned Girl. Polly, a teenager, is visiting her friend Fanny.

Fanny's friends did not interest Polly much; she was rather afraid of them [because] they seemed so much older and wiser than herself, even those younger in years. They talked about things of which she knew nothing and when Fanny tried to explain, she didn't find them interesting; indeed, some of them rather shocked and puzzled her.

Which choice best states the main purpose of the text?