Shane Is Called for Jury Duty and Is Selected for Possible

Shane is called for jury duty and is selected for possible service on a jury.However,when he is questioned by the defendant's attorney before final jury selection,Shane admits that he thinks the defendant is guilty based on the news reports that he saw on a social media site.The defendant asks the judge to excuse Shane from serving on the jury.If the judge agrees:

A) this is a valid challenge for cause.
B) this is a valid peremptory challenge.
C) this is not a valid challenge.
D) the plaintiff's attorney can have Shane serve by making an offer of proof to the judge.