Answer:
D, product-communication adaptation
Step-by-step explanation:
Product adaptation can be defined as the process of modifying a product to make it useful for a variety of users.
Communication adaptation can also be defined as the change in a product's communication as a result of a change in product strategy.
Product-communication adaptation can be defined as the modification of a product for a variety of users but ensuring that the marketing of the product is through standard communication channels.
In the case of Campbell adapted his product to look like M'm M'm Good product but ensured that he used a standard communication channel (ads) to market his product.
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