For each of the scenarios described below, state whether you think they indicate passive, active, or evocative genotype-environment correlation.
a. Mean cognitive ability scores of members of the school chess team were found to be higher than mean scores of a random sample of their peers.
b. The correlation between measures of the family environment and children's cognitive ability scores was found to be higher in nonadoptive families compared to adoptive families.
c. Adoptees of biological parents with high scores for antisocial personality measures were found to have adoptive parents who were more negative in their parenting than control adoptees.
d. Children who scored poorly on standard tests in a school were chosen to receive special attention in order to increase their scores.
