A professor surveys his students about their opinions on how well he taught the course. He puts this survey on the last page of his final exam. Which type of bias will most likely have the strongest effect on the survey results? -Not all students will have the access needed to find the survey. -Students may not truthfully reply because they fear it will affect their grade. -Students may not understand the wording used in the survey. -Not all students will be represented in the survey sample.