The answer:
The The character of Beatrice in Much ado about nothing is accused of
* Disdain and scorn- here are some examples of situations where this is mentioned in the story. First, we have the moment when Benedict arrives to Leonato's house and see Beatrice when he expresses this - What, my dear Lady Disdain! are you yet living?-
Another example could be during the conversation between Hero and Ursula in the garden when Hero says - But Nature never framed a woman's heart of prouder stuff than that of Beatrice; disdain and scorn ride sparkling in her eyes.
* Inability to love, this accusation happens during the conversation between Hero an Ursula too, when Hero says - All matter else seems weak: she cannot love, Nor take no shape nor project of affection-. A second example is the expression of Claudio during his conversation with Leonato where he says - I did never think that lady would have loved any man- referring to Beatrice.
Correct answer- improper etiquette. Beatrice being a lady that grew up surrounded by lords has a high-level etiquette, the family of Leonato her Uncle welcome the soldiers with all the proper elegance and respect that high society people are used to having. So that she's never accused of that fault.