Answer:
C. The surveys and personal observations provide primary data, while the journals provide secondary data.
Step-by-step explanation:
Primary data is defined as data obtained from analysis of a sample or population of interest.
Secondary data is one that is obtained from primary data. That is primary data that is put to some use.
In the given scenario the surveys and personal interviews of the customer are a primary source of data. Directly from the customer.
Data from journals is a secondary data source, as this contains information from previous studies (other primary data).