18 According to the passage, which of the following statements is true?
(A) Researchers have found that marriages are more likely to be successful if partners spend at least 6 hours aweek visiting chat rooms.
(B) Experts have found that spending too much time on the Internet can pose potential dangers to socialrelationships.
(C) Dr. Cash started to treat Web over-users at Internet Computer Addiction Services six years ago.
(D) Normal people would like to spend time researching their family tree on the Internet.