Which of the Following Is FALSE

Which of the following is FALSE?

A) The best way to begin research is to conduct a brief preliminary survey so that other areas of interest may be uncovered early in the research process.
B) A key problem is using secondary data is the difficulty of finding data that exactly fit the needs of the present project.
C) It is recommended that the researcher always use the primary source of secondary data.
D) Secondary data may be helpful in problem definition
E) Secondary data may be helpful in improving the methods by which primary data are collected.