Answer:
a. Monitor
Step-by-step explanation:
Monitor is one of the concept of integrated marketing where marketers have the knowledge of what consumer opinion are about the products or services in the market place and then react.
Monitoring is a continuous process. It will assist to know how well people like or dislike a product which will help in future promotional activities.
In monitoring, performance are checked, and actions taken to correctively ensure that the objective of the business is achieved.