Answer:
The correct answer is E
Explanation:
Product differentiation is the strategy of marketing which strives to differentiate the products as well as services of the company from the competition. And successful differentiation of product comprise of identifying and communicating the unique or different qualities of the offering of the company while highlight the distinct differentiation among those offerings and others in the market.
So, in this case, the maker attempt to differentiate their product from the competition and accomplishing the price control in this way is called as product differentiation.