Corey's Mother Was Advised That He Should Wait Another Year

Corey's mother was advised that he should wait another year before starting kindergarten. Since he was old enough, she enrolled him anyway. If Corey fits the profile of other children who were recommended to be held back a year, he

A) is likely to have poor social skills.
B) is likely to be bullied by the other children.
C) will score below his classmates on achievement tests.
D) will score just as well as his classmates on achievement tests.