Which Scenario Illustrates How Genetic Factors Influence a Child's Environment

Which scenario illustrates how genetic factors influence a child's environment?

A) Mary and Bill were raised in the country so they want to raise their children in the country.
B) Tina is very sociable and outgoing. She loves to have friends over to the house who also get to play with her baby, Joe.
C) Karen is going to an elementary school where children are grouped by the first letter of their last name for reading instruction.
D) Craig and Alice have decided that they only want one child. Martin is that child.