Answer:A. Activities C. Opinions
Explanation:One of the ways of generating data from the market is to seek the opinion and try to know the activities of customers concerning brands,product categories and user and non-user characteristics.
Inventory of opinions is the collection of opinions from the general public or from already available data. It helps to know the needs of the Customer and how to meet them.
Inventory of activities is the evaluations of the activities of the general public concerning your product or market segment,the activities can include their attitudes etc.