it is primaryily used to generate theory through relevant information taken from very reliable source and its focus is theory development​

It is primarily used to generate theory through relevant information taken from every reliable sources and its focus is theory development.

A. Ethnography

B. Phenomenology

C. Grounded Theory

D. Case Study

C. Grounded Theory

Explanation:

Grounded theory is a procedural and methodological system of qualitative research that is mostly used by social scientists. It involves the collection and analysis of data through which development of theories happens after data collection. It was developed by Glaser and Strauss in 1967.

It is primarily used to generate theory through relevant information taken from every reliable sources and its focus is theory development.