48. Sentence (5) : "Only children" also enjoy the advantage of having parents where, without the distraction of other children, are able to devote more time to him, talk to him, and stimulate him in intellectual activities. What correction should be made to this sentence? (A) Change      where      to        who     . (B) Change      the distraction      to      a distraction     . (C) Change      of having      to      to have     . (D) Insert      to      before      stimulate     .