Which of the following are types of primary research? Select ALL that apply.

Which of the following are types of primary research? Select ALL that apply.
A . Interviews
B . Questionnaires
C . Observation
D . Test marketing
E . Trade associations/professional bodies
F . National and local press
G . Industry magazines
H . Governments
. Websites
. Informal contacts
. Published company accounts
. Books
. Market surveys produced by external researchers
. Previously gathered marketing research
. Censuses
. Public records