Miss Pierce, how can you be such a foolish ignorant girl? As to think you could afford to pay Mr. Higgins. The author uses the line above to show the reader that.

A) Miss Pierce is seen as naive or lacking understanding by another character.

Based on the given line, "Miss Pierce, how can you be such a foolish ignorant girl? As to think you could afford to pay Mr. Higgins," it can be inferred that the author intends to show the reader that Miss Pierce is being criticized for her perceived foolishness and ignorance in thinking she could afford to pay Mr. Higgins. The line suggests that Miss Pierce may have overestimated her financial means or lacks knowledge about her financial situation.