The language arts teacher wants to know whether the students in the entire school prefer a debate or an speech. the teacher draws a random sample from the following groups:
• all teachers in the school
• all boys in each grade
• all students in the speech club
• all students in each grade
which group best represents the population she should take a random sample from to get the best results for her survey?
a. all teachers in the school
b. all boys in each grade
c. all students in the speech club
d. all students in each grade