‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ is that sampling procedure which does not affect any basis for estimating theprobability that each item in the population has of being included in the sample.

• A. Probability sampling
• B. Non‐ probability sampling
• C. research design.
• D. none