MS. Alvarez wants to determine the seventh graders' preferences for the location of the end-of-year field trip. Which of the samples is
representative of the population?
A
All students in Ms. Alvarez's fifth-period class
B.
SWISS
All students in Ms. Alvarez's advisory group
C.
Every third student from an alphabetical list of all students in the entire school district
D. Every fifth student from an alphabetical list of all seventh graders in the school