QN=17 P&G introduced its Duncan Hines ready-to-spread frosting in a small geographic area. When General Foods became aware of the product, it rushed to market its own Betty Crocker ready-to-spread frosting, which eclipsed the Duncan Hines product introduction. This act illustrates ________.
a. why many companies engage in test marketing
b. one of the problems associated with test marketing
c. why prototypes are so important
d. how idea screening can make a product a commercial success
e. the variety of sources for idea generation