Today's health conscious society has caused cereal manufacturers to rethink their products. Now many cereals such as Frosted Flakes are being marketed as being healthier because they are made with whole grains and have less sugar. This is an example of

D) Repositioning.

Explanation:

This is an example of repositioning, where an organization re-position itself in the minds of the consumers again based on another mental map. For example, if a brand once was known as the low price brand, then after sometimes, when the company feels that now its the time to make quality products priced at higher rates, then they will be in need of re-positioning. They should place their product effectively at another frame of reference where consumer can think them as a quality product providers at the premium prices.