A teacher at a community college sent out questionnaires to evaluate how well the administrators were doing their jobs. All teachers received questionnaires, but only 10% returned them. Most of the returned questionnaires contained negative comments about the administrators.
Explain how an administrator could dismiss the negative findings of the report.
Choose the correct answer below.

a) This was only one survey and people's opinions change over time.
b) There is measurement bias. The questions could have been worded in such a way that the respondents' responses were influenced.
c) The entire population was surveyed and therefore inferences cannot be drawn.
d) There is nonresponse bias. The results could be biased because the small percentage who chose to return the survey might be very different from the majority who did not return the survey.