The correct answer is the news he's received makes him feel nervous.
Explanation:
This quote suggests that after the news he received he is very nervous. This is because his fear of becoming a murderer has intensified, and that is seen to be closer to being real because what the witches had predicted came true, so he fears he is not prepared to commit murder.
He even shows signs of being nervous with "spiky and unkempt hair" and his heart pounding in his ribs. "
Although he wants to become the new king, he fears that he will not be ready to commit that horrible crime.
