Starbucks sometimes offers a promotion known as the "treat receipt." Patrons purchase a drink of their choice in the morning and then will receive a receipt to turn in after 2:00 p.m. that same day. With the receipt the customer can choose from any grande iced beverage for just $2.50. Which is the most likely market modification strategy for Starbucks here?

A. finding new users
B. creating new use situations
C. increasing a product's use by existing customers
D. modifying the product
E. reacting to competitors' positions