Answer:
D. selecting representative elements from a population and treating their answers as typical of all those in whom they are interested.
Step-by-step explanation:
Marketing comprises of all the activities such as, identifying, anticipating set of medium and processes for creating, promoting, delivering, and exchanging goods and services that has value for customers. It basically, involves understanding customer needs, building and maintaining healthy relationships with them in order to scale up your business.
In marketing research, sampling refers to selecting representative elements from a population and treating their answers as typical of all those in whom they are interested.