When Faced with a Challenging Group Sales Dialogue, Which Tactic

When faced with a challenging group sales dialogue, which tactic should a salesperson employ with respect to eye contact?

A) scan rapidly but evenly from side to side to make sure that everyone receives eye contact
B) look just over the heads of the audience so that even those at the back feel like they are being paid attention to
C) focus on the shirt collars of each member to avoid singling out anyone inappropriately
D) connect with individuals or small subgroups for a few seconds and then move on, making sure to cover the whole room during the presentation