Which of These Is an Example of Differential Attention Used

Multiple Choice

Which of these is an example of differential attention used properly?

A) Ignoring a child who gets out of his seat and runs around the room and the calling on him as soon as he sits down and raises his hand.
B) Ignoring a child who is throwing materials.
C) Refusing to call on child who was rolling around on the floor during circle time, even once the child is sitting up.