This question has options. Answer the question about text:

I was amazed , considering these are people that have no problems calling the father of the groom 's live in girlfriend a " slut " at the RECEPTION . But they decided to mingle with us heathens . THey also did n't want their kids to play with our kids , but , and this is the beauty of kids , kids are n't real concerned about the moral purity of some other kid 's parents . All they care about is , well , in this case , swings , balls , sandboxes , and that cool bug that 's crawling around the table .

What type of event is the narrator attending ?
Options are:
A). They are at a girlfriend 's birthday party .;
B). They are at a nuptial ceremony .;
C). They are at an anniversary .;
D). They are at a birthday .;
B).