Tomas Is Studying Children Who Have Been Adopted by Families

Tomas is studying children who have been adopted by families that are very different from their biological families.If Tomas finds that these children have similar levels of intelligence to their birth parents,his findings will support the idea that

A) nature is the primary determinant of intelligence.
B) nurture is the primary determinant of intelligence.
C) nature and nurture both determine intelligence equally.
D) there is not enough evidence to support anything.