When Moderate Intervention Is Required Because a Student Is Misbehaving

When moderate intervention is required because a student is misbehaving, for example, the student keeps interrupting the class activity despite requests and warnings to stop the behavior, which of the following "next steps" would likely be most appropriate?

A) Ignore the student and avoid making eye contact with him or her.
B) Move closer to the student and wait for the misbehavior to stop.
C) Remind the student that such behavior is unacceptable.
D) Isolate or remove the student from the situation.