Which of the following might explain the beauty premium found by labor economists Hamermesh and Biddle?
A.) Good looks are an innate ability for some jobs, which results in higher productivity and higher wages.
B.) Good looks may be an indirect measure of other types of ability such as attention to detail.
C.) If better-looking people earn more than average-looking people, employers may be discriminating based on personal appearance.
D.) All of the above could explain the beauty premium.