‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ is a sampling procedure in which the elements for the sample are chose from thepopulation in groups.

• A. Stratified sampling
• B. Systematic sampling
• C. Cluster sampling
• D. multiphase sampling.