The Difference Between a Cluster Sample and a Multistage Sample

Multiple Choice

The difference between a cluster sample and a multistage sample is:

A) Cluster samples are probability samples;multistage samples are not
B) Multistage samples sample both clusters and participants;cluster samples just sample clusters
C) Cluster samples rely on clusters of participants;multistage samples collect data from participants at different stages
D) There is no difference between them