Six-Year-Old Lara Hugs Her Mother Whenever Her Mother Hugs Her

Six-year-old Lara hugs her mother whenever her mother hugs her, but six-year-old Benji wriggles away from his mother when she tries to hug him. Now Lara's mother appears to be more affectionate than Benji's mother. This is an example of which of Rutter's principles?

A) Individuals differ in their reactivity to the environment.
B) There is a two-way interplay between individuals and the environment.
C) People actively process their experiences rather than being passive recipients.
D) People act on their environment so as to shape their experiences.
E) The interplay between persons and their environment needs to be considered within an ecological framework.