Which Outcome Has Not Demonstrated in Research on Physical Attractiveness

Which outcome has not demonstrated in research on physical attractiveness?

A) Attractive students were able to solicit more signatures on a petition than unattractive students.
B) Unattractive defendants received larger court fines than attractive defendants.
C) Teachers expect attractive children to be smarter and achieve more than unattractive children.
D) Attractive employees earn approximately the same salaries as unattractive employees.