Answer:
B) experimentation.
Explanation:
Experimentation is the process by which a business strategy is tested on a smaller scale before it is adopted on a wider scale. A business process or product can be introduced to a particular test group and based on the results extrapolated to other areas.
In this scenario Cami the marketing manager for a regional furniture maker monitors each marketing campaign on overall sales. She also tries novel promotional offers to first time customers in a bid to test efficacy. This is use of experimentation.