Answer:
The correct answer is letter "B": Focus Group.
Step-by-step explanation:
A focus group is a qualitative investigation method that gathers participants of an interview who expose opinions about products or services. A focus group is a type of investigation widely used in marketing. In focus groups a problem is defined at first, then the participants are selected out of a list of customers. Next, the chat is determined to have an idea when it should be moderated. Finally, the results of the focus group are analyzed.