15 (A) The selection practices of Internet matchmaking services do not always create happy customers. (B)Modern group-maintenance matchmaking still occurs in many cultures, but it usually has less to do with social caste than with other affiliations, such as religion or ethnicity. (C) Sometimes the matchmaker represents the female side and looks at available males. (D)Especially in cultural traditions that encouraged marriages between 11- or 12-year-old children, this belief was probably true.