"George turned out to be the father of one of my old school-friends." By this the speaker means that

• A. George was the father of one of the school-friends of the speaker.
• B. George refused to become the father of one of the school-friends of the speaker.
• C. George went out of the room of one of the school-friends of the speaker.
• D. George did not prove that he was the father of one of the school-friends of the speaker.