Which Piece of Evidence Suggests That Social Learning Is a Weak

Which piece of evidence suggests that social learning is a weak influence on personality development?

A) Adopted children are more similar to their biological parents than to their adoptive parents.
B) Identical twins are more similar to each other than are fraternal twins.
C) Non-shared environment seems to play a large role in personality development.
D) Genes associated with the production of dopamine have been associated with novelty seeking