An Evolutionary Explanation for the Relationship Between a Face's Symmetry

An evolutionary explanation for the relationship between a face's symmetry and its perceived attractiveness is that

A) asymmetrical faces are less familiar and therefore more distinctive in memory.
B) facial symmetry is associated with physical health and fitness.
C) biological factors have very little to do with facial symmetry.
D) parents devote more resources to caring for offspring with symmetrical faces.