Question

\You want to find out the favorite subjects of students at your school. Which plan describes a good sample?

Answer 1

I believe the correct answer would be A.

I assume this because compared to the other given options, this method would target the most diverse audience.

Answer 2

Sample A will be a good choice.

It has students from all classes and all subjects.

All other options don't guarantee that they have students from all possible subjects.