Answer:
Confidentiality of the individual subject's responses
Explanation:
A research can be described as a systematic investigation to study the details of a subject in order to understand or discover new things or information about the subject.
It should be understood that , research always involve the voluntary participation of people, and it is done by a survey. This is because , people are not meant to be forced in taking part in a research.
In this case, the researcher conducted the survey by making sure that the participants responses are confidential. That is nobody can link a response to a particular person, since it was conducted anonymously.
