The homecoming dance committee plans to conduct a survey to determine the student body's opinion on a theme for the dance. Which sampling method would be most likely to result in selection bias? A. Entering a second-period math class and surveying all the students in that class B. Standing at the school entrance and surveying every 5th student that walks in C. Emailing a survey to all students, but only freshman girls respond D. Setting up a table in the gym where people can give their thoughts before school