Answer: (C) Perceptual mapping
Explanation:
The perceptual mapping is one of the type of technique that is used by the marketers for visually displaying the different types of perceptions of the consumers and the users.
It is also known as the market mapping technique that is used for the developing the various types of brands and the products in the market for based on the customer perspective.
According to the given question, the Apex corp. is using the perpetual mapping technique for determining the different types of product attribute in the market.
Therefore, Option (C) is correct answer.