Every day, Atsuko watches her mother Miku feed and bathe her little sister and put her little sister to bed. Miku notices that Atsuko begins to play with her favorite doll in a similar way. Atsuko pretends to feed and bathe her doll and puts her doll to bed at night. Atsuko's behavior can be best explained by:
a) Biopsychosocial theory
b) Social cognitive theory
c) Evolutionary psychology theory
d) Cognitive theory