WHO ?

Now try this process yourself using a different website ...

By checking the URL for this site, what can you learn?

The site creators are being purposefully vague.
The site is non-commercial.
General Motors is sponsoring the site.
All of the above.

Examine a screen capture of the site and try to determine more information.

Look at the page. This is an interview conducted for Information Services Latin America by Antonio Prieto. But the important authority question here is who is he interviewing and can that person be considered an authority on the topic of the interview. The person being interviewed is Martha A. Ojeda, the Executive Director of the Coalition for Justice in the Maquiladoras. So, let's apply the tutorial's original question.

On what can Ojeda be considered an authority?

Her organization.
Her personal experience.
The process of organizing workers in maquiladoras.
All of the above.