An Expert Team of Scientists Compared 1,000 Sets of Monozygotic

An expert team of scientists compared 1,000 sets of monozygotic twins reared by their biological parents (Caspi et al., 2004) . The researchers asked the mothers to describe each twin. Descriptions ranged from very positive to very negative. The researchers measured personality at age 5 (including antisocial behavior as reported by kindergarten teachers) and then measured each twin's personality two years later. The results revealed that _____.

A) if mothers were more negative toward one of their twins, that twin became more antisocial at age 7 than at age 5
B) if mothers were less negative toward one of their twins, that twin became more antisocial at age 7 than at age 5
C) if mothers were more negative toward one of their twins, that twin became less antisocial at age 7 than at age 5
D) there was no relation between maternal negativity and child antisocial behavior