R immediately picked up the hurt in his voice because he had not been invited . It was just wrong that he had not been invited . I kept trying to mollify it to R by reassuring him that it was not our doing nor our fault . Her birthday , she is free to invite whoever she likes .

Choices:
[-] he wants be happy about her birthday;
[-] he was angry from not being invited;
[-] he wants his own birthday party;
[-] None of the above choices .;
Q: Why was R being reassured ?
he was angry from not being invited