question.
All students at a school are invited to visit the school's website and complete an online survey about the school's lunch program. The
researchers
analyze the survey results and report that most students think the school's lunch program is serving enough healthy foods.
What is the largest source of bias in the researchers' conclusion?
A. The sample size was too small.
B. The survey invitation did not represent the entire population.
c. The survey discouraged honest responses because it was on the school's website.
OD. The report was based only on responses of those who voluntarily took the survey.