Match the Key Term with Its Definition

Match the key term with its definition.
-Cluster sampling

A) Groups are randomly selected, and then elements are randomly selected from those groups.
B) Sub-groups within the population are identified as sharing some characteristic, and elements are randomly selected from with those sub-groups.
C) Elements are selected by use of a random number table.
D) Elements are selected by choosing every nth element on the sampling frame after a random starting point.