All Are Signs That a Child Has Entered the Stage

All are signs that a child has entered the stage of concrete operations EXCEPT:

A) an interest in games,such as checkers,rather than playing "pretend."
B) an ability to "get" school by understanding basic addition and subtraction.
C) the capacity to be home alone for short periods of time,without the parents being worried.
D) being more scared of imaginary monsters than before.