Chrissie Wants to Increase the Number of Tips She Gets

Multiple Choice

Chrissie wants to increase the number of tips she gets in her part-time waiting job. Her best chance of success is to:

A) drop the odd empty plate in front of guests.
B) after taking an order, let the customer do the talking.
C) maintain steady eye-contact with her customers.
D) casually and discreetly touch each customer's hand.