A Major Disadvantage of Primary Data Collection Is

A major disadvantage of primary data collection is

A) it can be accessed only through syndicated databases or unstructured data mines.
B) it cannot be tailored to meet specific research needs.
C) it requires more sophisticated training and experience to design the study and collect data.
D) it is too general to meet researcher's and manager's needs.
E) it does not offer behavioral insights that can be obtained from secondary data.