6. Qualitative research studies:
A. Require valid and reliable research instruments.
B. Require complete objectivity of the researcher.
C. Measure emotional responses rather than object physiologic responses.
D Do not make use of inferential statistical techniques.

Correct option is (D)

Explanation:

Qualitative research is carried out by the researcher to understand a phenomena without using quantitative techniques. The variables are not quantified.Though, it can act as a boundary study from quantitative research.

A qualitative research requires the research instruments to be objective and objectivity of researcher. It measures social and emotional responses in the form of people's experiences, opinions and beliefs. It however, does not require use of mathematical or statistical techniques to make inferences or conclusions.

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manifest functions are the recognized and intended consequences of any social pattern, while latent functions are those unrecognized and unintended consequences. to analyze the manifest functions of any social institution, we have to study its contribution to the continuation of a group, community, or society.