Crystal Is Going to a Singles Night at the Bar

Crystal is going to a singles night at the bar. Before she leaves the house, she spends hours in front of the mirror perfecting her hair and make-up in order to compete with the younger and more attractive women for men's attention. What evolutionary concept would this be an example of?

A) intrasexual selection
B) resource based selection
C) intersexual selection
D) superficial selection
E) purely sexual selection