What is the purpose of a literature review before conducting a research study?

A) To determine the purpose of the proposed research study
B) The study's hypothesis will guide the literature review.
C) To discover existing knowledge about the identified problem
D) Reliability can be assured through a literature review.

The purpose of a literature review before conducting a research study is to discover existing knowledge about the identified problem. It allows the researcher to identify any gaps in existing studies and helps in determining the research questions or hypotheses. It also helps in building the theoretical framework for the study, identifying appropriate methodologies, and providing relevant data for analysis.