A school found that the number of students buying lunch from the cafeteria had declined. The school wants to revise its current lunch menu.
They asked parents and students to suggest new meals. Which method of selecting new meals will produce an unbiased result?

A. All of the suggested meals will be reviewed by the teachers and their favorites will be used.

B. All of the suggested meals will be shuffled into one stack and every 10th suggestion will be used.

C. A box will be placed at the school entrance for parents to drop off their meal suggestions. Every 10th suggestion will be used.

D. A box will be put in the cafeteria for students to drop off their meal suggestions. The first 20 will be used.