Which of the following statements about primary data and secondary data is/are true? A. Primary data are collected by the researcher; secondary data are derived from primary data. B. Secondary data are collected through interviews, surveys; primary data are derived from books, newspapers, Internet,... C. Primary data has fewer resource requirements; secondary data has more resource requirements. D. Primary data are fresher and more updated; secondary data tends to be of higher quality. E. Secondary data are less suitable to match our need; primary data are better matching our need.