Sorry to say this but I think the question is asking you what event would make you feel as happy as billy, not anyone else.
4. D. Andy was shocked and horrified to hear the details of how Ann was killed and felt her loss more deeply.
5. C. “‘Hearing Conor,’ he said, ‘I made sounds I’ve never heard myself make. To hear that your daughter was on the floor saying ‘no’ and holding her hands up and still be shot is just — it’s just not...’ He tried to explain the horror of such knowledge, but it’s not easy.” ( Paragraph 92)
This evidence best proves the answer to question #4 and explains why #4 is correct. In option C, it specifically states Andy's reaction to Conor's account of Ann's murder. Listening to Conor tell about how Ann was on the floor and saying, "no" while she was helpless to stop him, horrified and shocked Andy. The narrator specifically says that the horror of the knowledge was hard for him to explain.
