Answer:
D. Qualitative methods
Explanation: Research methods are the various Strategic actions and techniques used to carry out a research, it can also be said to the techniques through which a researcher collect data or materials needed for the research.
Qualitative research methods are techniques used in research which involves open ended questions and Communications.
IN QUALITATIVE RESEARCH METHODS ARE SPECIFICALLY DESIGNED TO ENHANCE OPEN COMMUNICATION,IT HELPS THE RESEARCHER TO GET IN DEPTH KNOWLEDGE ABOUT THE RESEARCH AUDIENCE.