Read this sentence from "Charles."

"We had a little trouble adjusting, the first week or so," she said primly, "but now he’s a fine little helper."

What does the word primly suggest about Charles's teacher?

She is trying to be professional and correct in her discussion of Laurie's difficult behavior.

She is being sarcastic about the way Laurie behaves in class.

She is angry about Laurie's disruptive misbehavior in her class.

She has a strict, disapproving look on her face.
Can u guys please help!