Answer:
"B"
Step-by-step explanation:
This is a form of market test in which a sample region is selected to test customers response to the introduction of a new product before it is fully launched.
It is mostly practiced by the manufactures of packaged goods due to its highly competitive nature ,short purchase cycle and low cost of switching products.
It enables sales performance to be measured ahead of full introduction as the marketers get a understanding of the potential market environment