1 point 52. A primary school with six grade levels would like to do a survey with 50 students about their favourite lunch menu. The school would like the sample to be fair. Which set of students should they collect the 50 samples from? * O All the students from the 4-H clubs. O Grade 6 students only. Randomly selected students from grades 4-6 only Randomly selected students from across all 6 grade levels.