The Shinn Company wants to manufacture a new mouthwash designed to fight cavities and whiten teeth. The Shinn Company looks at the previously collected data over the last three years on consumer preferences in mouthwash and looks to social media to see what customers are saying about its products. This is an example of .

Secondary data

Explanation:

Secondary data means the data i.e. collected by the someone other than the data i.e collected for the first time. It includes the information that related to the censuses, government departments, etc for researching purpose

Since in the given situation, the company looks to the data i.e. already collected and according to this they are able to make the analysis

So, here it is an example of the secondary data

c.

explanation:

regressive tax taxes the poor and less of the wealthy. this the rich get richer and the poor get more poor. this would create a large wealth gap.

answer; test-retest;