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 $3$Select one:

a$.$

All of the needed data is rarely available.

b$.$

It may not be useable.

c$.$

It is generally more expensive when purchased from the government.

d$.$

It may not exist.

e$.$

You do not know why it was originally collected.