What is the meaning of impertinence in this sentence from the passage?

I believe it is difficult for those who publish their own memoirs to escape the imputation of vanity; nor is this the only disadvantage under which they labour: it is also their misfortune, that what is uncommon is rarely, if ever, believed, and what is obvious we are apt to turn from with disgust, and to charge the writer with impertinence.

rudeness

plagiarism

poor taste

self-importance