The Judge Has Assembled a Group of Prospective Jurors and Is

The judge has assembled a group of prospective jurors and is asking them to raise their hand if the answer is "yes" to the following question. He asks, "Do any of you have an opinion at this time as to the guilt or innocence of the defendant?" The judge sees that no one has raised a hand, so he accepts all as jurors. Did the judge make a good decision?

A) The judge did not make a good decision as asking yes/no questions is not a good way to uncover jurors' biases.
B) The judge did not make a good decision as the proper way to ask jurors questions is to let the attorneys do it.
C) The judge made a good decision as research shows that you can believe those who claim to be impartial.
D) The judge made a good decision because if someone held a strong opinion, they would have raised their hand.