【单选题】According to the article, why might online matchmaking have more natural appeal to unmarried people in countries like India and China than it does to singles in the United States?
A.
the online matchmaking companies in those countries have better scientific research backing up their matches than do the U. S. companies
B.
those cultures have a long history of matchmaking and arrange marriages, so single people are more accustomed to having other people inter in their love lives
C.
the institution of marriage is less important in the U. S. than it is in other countries
D.
online matchmakers have invested much more money into advertising campaigns in those countries than they have in the U. S.