Lars points out to Lloyd that Lloyd's face is attractive because of how symmetrical it is. Lloyd does not understand why symmetry would be related to attractiveness. What could Lars say to support his argument?

a. Symmetrical faces are naturally associated with biological health and fertility.
b. Symmetry is subjective, so Lars is only expressing his opinion.
c. Symmetrical faces are associated with romantic qualities.
d. Symmetrical faces are more attractive because they are more distinctive.