Guys, what is sexier to you?

if a grl is meeting a guy in a private place, is it sexier for her to be wearing a tight white tank top with no bra where her nipples are visible a bit but her boobs are only like a B cup OR a tank top with a red pushup bra under that makes her boobs look like a large C cup. assuming this guy has laready seen her topless before but not recently.