Four students did a survey to find the pizza topping sixth-grade students prefer. The table below shows the method each student used to conduct the survey: Student Method Troy Asked 100 students at random from his seventh-grade class what their favorite pizza topping is Dacia Asked 100 eighth-grade students at random what their favorite pizza topping is Julia Asked 100 sixth-grade students at random what their favorite pizza topping is Tanner Asked 100 third-grade students at random what their favorite pizza topping is Which student's survey is most likely not biased? Troy Dacia Julia Tanner