For Grinders to Show More Interest in a Heterosexual Partner

For grinders to show more interest in a heterosexual partner, they could not do it just by dancing, since this act, in itself, had sexualized overtones. Rather, to indicate interest

A) students allowed closer proximity to each other and sustained the grinding for longer periods of time.
B) students never made eye contact with potential partners or gestured with their finger to come closer.
C) students had a friend whisper in a potential partner's ear that she was interested in the man coming closer.
D) students never directly made overt moves for fear that they might be rejected or rebuffed.