Which of the Following Statements Is True of Internal Secondary

Which of the following statements is true of internal secondary data?

A) It is expensive to access the sources of internal secondary data.
B) Internal secondary data cannot be used by decision makers in planning new-product introductions.
C) It can be easily obtained from scholarly and government sources.
D) Internal sources of secondary data are accessed only after getting useful information from external sources of secondary data.
E) Internal secondary data are the most readily available.