12. these are authentic materials and have not been subjected to evaluation or assessment A. primary source B. Secondary source C. tertiary sources D. Electronic sources 13.indexes, abstracts, bibliographies,dictionaries database are classified as A. primary source B. Secondary source C. tertiary sources D. Electronic sources 14. matt uses textbooks,magazine articles andand book reviews as sources for his project what type of sources does he use? A. primary source B. Secondary source C. tertiary sources D. Electronic sources