How do we discover the purpose of the interviewers in interview with marielle tsukamoto? a) by making judgments based on their age and ethnicity b) by examining who they are and what questions they ask c) by reviewing the grammar of the interviewers’ questions d) by providing a reason for the interviewers to talk to you

The correct answer us in fact B) by examining who they are and what questions they ask.
Based on the content of those questions, we can infer what the purpose of those questions actually is. By also investigating who the interviewers are and what their background is, we can see why they are asking those questions. The other options are absurd.