Which of the below questions would be considered an ethical question in marketing research? Select all that fit this description.

Question $5$ options:

Should we start with secondary or primary data when starting a new research project?

For product development research, what is marketing's role?

What level of privacy can users of online forums expect?

What is the right sample size for most experimental research questions?

Is it okay for apps to share user data with third$-$party companies?