A Major Difference Between Kohlberg's Cognitive-Developmental Theory and Martin and Halverson's

A major difference between Kohlberg's cognitive-developmental theory and Martin and Halverson's gender-schema theory is that gender typing in the gender-schema theory

A) does not begin to develop until after children have developed gender stability and gender consistency.
B) begins as soon as children acquire gender identity at around two to three years of age.
C) develops via passive exposure to external models of gender-typed behaviors.
D) is unrelated to cognitive development.