Answer:This type of research is a questionnaire
Step-by-step explanation:
A questionnaire is a research with a set of questions which are used to establish or discover people's attitude, opinions, preferences and values considering an issue in question.
They can be done telephonically by asking your customers questions , through email by sending them survey to fill out or face to face survey.
There is an open and closed questionnaire , in an open questionnaire participants are able to give their opinion freely and expressively whereas in a closed questionnaire they only respond with one word like yes or no .
Using the above open Questionnaire Adeeb will be able to establish what her customers like and feel about pastry along with its prices which will assist her decision making concerning her pastry business.