Pam plans on surveying students to determine whether more sixth-graders or the eighth-graders participate in after school activities. Which data collection method would give her the MOST representative information? survey 40 randomly selected students at the eighth-grade dance survey the first 40 students who enter the school building on Monday survey 40 randomly selected students studying in the library during the lunch hour survey 20 sixth-grade students and 20 eighth-grade students randomly selected from the school