The correct answer is letter C
Secondary research, or “documentary research”, is the synthesis of information and data that has already been collected by other sources. Magazines, books, import and export data, production data, statistics and government censuses are some examples of secondary research.
Meaningful research must produce at least one formal publication. Throughout the research process, documents are produced, also called “sources”, which can be classified into: <u>first-hand (or primary) sources, second-hand (or secondary) sources and tertiary sources.</u>
