18. The following text to answer question number 18. Child kidnapping is becoming one important issue in Indonesia. Until today, there are several cases which are handled by the police. One of several reasons why child kidnapping happens is that the price or human organs in black market is expensive. People earn money from selling the organs. In addition, parents control need to be tighted so that this case is gradually decreased. The reason why child kidnapping happens is .... A. police handle other cases B. people want to adopt a child C. the organ is taken for high price D. parents watch their child seriously​