The transcript of Facebook founder Mark Zuckerberg testifying before the US Congress in April 2018 would be considered what type of source? primary secondary key witness ancillary

# Brief Explanations: <br />A transcript of testimony given by an individual, especially before a body like the US Congress, is a firsthand account of that person’s statements during the event. Therefore, it is considered a direct or primary source of information because it is the original, uninterpreted record of what was said.<br /><br /># Answer: <br />primary