Sampling methodology (Answer A) involves selecting a subset of items from a larger population to represent the characteristics of the whole. This is a fundamental process in statistical analysis and quality management, where it is often impractical or impossible to examine an entire population. Proper sampling methods ensure that the chosen sample accurately reflects the population, allowing for reliable conclusions and decisions.

The other options are distinct concepts:

Outlier identification (B) refers to detecting data points that deviate significantly from other observations, which is not directly related to representing characteristics of a whole.

Statistical significance (C) measures whether a result is likely due to chance, rather than sampling or representation.

Benchmarking (D) involves comparing processes and performance metrics to industry standards or best practices, not selecting representative samples.