Answer:
Primary data
Step-by-step explanation:
Since the available secondary data are not sufficient for the marketing research study, Chun Hei must collect primary data.
Primary data unlike secondary data are data that were not in existence beforehand. Such a data can not be found in any journals, books, websites or data sites. To get primary data a researcher has to go into the field and they can collect these data through questionnaires, surveys or interviews. Chun Hei will get the information she needs from first hand sources.