A student council wants to know whether students would like the council to sponsor a mid-winter dance or a mid-winter carnival this year. Classify each sampling method. a. Survey every tenth student on the school's roster. [Select] b. Survey all students in three randomly selected homerooms. [Select] c. Survey a random selection of those who happen to be in the cafeteria at noon. [Select] d. Survey those who ask the council president for a questionaire. [Select]