Answer:
D) None of the above
Step-by-step explanation:
Other regions may not respond to the loyalty program in the same way as the test region did, and in fact management cannot even be sure that the new loyalty program has increased sales where it was implemented.
While it is true that the experiment yielded a positive result, resulting in customers in this region becoming more frequent buyers, management can not yet have a conclusive result of the experiment.
This is because the new loyalty program was successful for this region in particular, however other regions could give different results in the experiment, so management should take a larger sample in different regions to ensure or discard with more data, that the customer loyalty program would serve all of its other branches.