Answer:
c. naturalistic observation
Explanation:
Naturalistic observation: In psychological research, the term "naturalistic observation" is determined as one of the different techniques of research in which the investigator or an experimenter tends to examine or observe a set of people or a person in his or her natural environment without any modification. The investigator or the experimenter then writes down all the points that he or she might have noticed.
In the question above, the given statement represents naturalistic observation as the correct answer because through this Gina and Thuy will be able to find what they are being intended to find.