Question

Statistics classifying samples (I am not sure if this is B or C)

Answer 1

C.

EXPLANATION :

Cluster sampling divides the population into smaller groups known as clusters.

Then randomly selecting among these clusters to form a sample.

In A, there's no grouping.

In B, there is a grouping and he randomly chooses 9 groups and selects all of the passengers.

In C, there is a grouping and he selects 12 passengers at random from each group

The best scenario that represents a cluster sampling is C.