Vending Machines Typically Are Illuminated to Signal to Potential Customers

Multiple Choice

Vending machines typically are illuminated to signal to potential customers that they are in working order and able to deliver their products. Since most vending machines offer a number of product options (e.g., six kinds of soda) , a little red light on an option's key panel is illuminated when that particular item is sold out. The little red light is a _______ and the product label is a _______ in a _______ discrimination.

A) target; feature; feature-negative
B) target; feature; feature-positive
C) feature; target; feature-negative
D) feature; target; feature-positive