Nutrimax Corp. is most likely to be using D) Market development
Step-by-step explanation:
Nutrimax is using extensive and elaborate advertising campaigns for its products which are already in the market which means that it is marketing to the audience that is not already buying some of their products.
It is to get them to buy these products.
The campaigns mainly focus on the features and benefits of the products that differentiate the cereals from the competition. This means the campaign is to get over others in the brand and to get their own product a better market share which is used for the strategy of Market Development.