Actimel is a dairy-based probiotic supplemental beverage made by Dannon. Originally, it was sold in organic food stores and only promoted in natural health magazines. The company has recently embarked on an extensive advertising campaign to promote the product to a larger health-conscious market. First, Dannon needs to explain to the general public the benefits of the product, and then it needs to create brand awareness. To determine the long-term effects of its campaign Dannon could most effectively use:
A. day-after recall tests.
B. tracking studies.
C. Starch recognition tests.
D. on-air tests.
E. split-run tests.
Answer: B