Answer:
C) exploratory research
Explanation:
When the problem is not clearly defined, investigators usually use exploratory research. In this case, what does it mean for a pastry to be successful: has good taste, sells a lot, increases revenue, is profitable, how can it be improved, etc.
There are simply too many options that can define if a product is successful or not. This is why Adeeb's team prepared a survey that include questions that were not that specific. Why do you like or dislike the pastry? If the pastry's price is X would you buy it, if its price is Y?
The purpose of exploratory research is to better understand and gain knowledge about the problem, but it is really difficult for this type of research to provide a definite conclusion or answer.
