Which of the Following Statements About Secondary Data Is True

Which of the following statements about secondary data is true?

A) Secondary data are more costly to gather than primary data.
B) Secondary data are always valid even if they are not always reliable.
C) Secondary data are more time consuming to gather than primary data.
D) The wealth of secondary data available guarantees the researcher will do a good job.
E) Secondary data can be gathered from internal as well as external sources.