For a survey on affirmative action, researchers selected a random sample of 20 faculty members from a large research university. Faculty in the sample were asked, "Do you favor or oppose using race, religion, sex, color, ethnicity, or national origin as a criterion for college admission?"

Is this sample representative of the entire population of faculty at this large research university?

(a) Yes, because it is a random sample.

(b) No, because the sample size is too small.

(c) No, because it is a convenience sample.

or (d) No, because they did not survey all faculty.