A director is charged with the murder of his wife. The prosecution charged that the director poisoned his wife by mixing a toxic extract of lily of the valley into her yogurt. This was the same poison used in the director's recent film. The prosecution also alleges the director wanted to marry his cinematographer, but feared a divorce from his wife might affect his popularity and the box office receipts for his next film. The defense called the wife's personal physician to the stand as its first witness. During examination, the director's lawyer asked, "Isn't it true that the wife's cause of death is unknown?" The doctor responded, "No, she died after ingesting poison." The director's lawyer then asked, "Isn't it true that you wrote in the wife's death certificate that the cause of death was unknown?" The prosecutor objected. The judge's ruling will be that the last question is Question 10 options: a) Proper, because specific instances of a witness' dishonesty may be inquired into on examination of the witness him or herself. b) proper, because a party may impeach its own witness. c) not proper, because a party may not impeach its own witness with a prior inconsistent