Your assistant wants to use secondary data exclusively for the current research project. You advise him that the use of secondary data has some potential problems. Which of the following is NOT one of them?

Question $6$Select one:

a$.$

You do not know why it was originally collected.

b$.$

It may not be useable.

c$.$

It may not exist.

d$.$

It is generally more expensive when purchased from the government.

e$.$

All of the needed data is rarely available.