Answer: Using a single target market approach
Step-by-step explanation:
In the single target market approach the population is segmented into homogeneous segments bases on the same kind of interest of the audience and the product and service used for the marketing remain the same.
According to the given situation, the marketing of snack food is done on three different homogeneous segments of the society including the dieters, health faddists and nutrition conscious people who have common center of interest that is nutrition.