Researchers from a Danish Study Discussed in Your Text Videotaped

Researchers from a Danish study discussed in your text videotaped children ages 11 to 13 while they were eating lunch at school. The children's behaviour was rated in several categories, including sociability, involuntary movement, and general neuromotor signs. When compared with people who either had a different psychiatric disorder or no disorder at all, researchers found that adults who developed schizophrenia

A) had significantly less abnormal movements in childhood.
B) had disruptive behavioural outbursts as children.
C) were significantly less sociable as children.
D) showed abnormal cognitive functioning in childhood.