Answer:
The answer is a, conception of products.
Step-by-step explanation:
Marketing mix" is a general phrase used to describe the different kinds of choices organizations have to make in the whole process of bringing a product or service to market. The 4Ps is one way – probably the best-known way – of defining the marketing mix, and was first expressed in 1960 by E. J. McCarthy in his book, "Basic Marketing - A Managerial Approach."
The 4Ps are:
Product (or Service).
Place.
Price.
Promotion.
A good way to understand the 4Ps is by the questions that you need to ask to define your marketing mix.