Position: "Probability sampling represents the best strategy for selecting research participants".

1. Explain why this position is the best strategy for selecting research participants. Support your explanation with an example and support from the scholarly literature.
2. Select a data collection method (e.g., surveys, interviews, observations) and briefly explain at least one strength and at least one limitation.
3. Identify a potential ethical issue with this method and describe a strategy to address it.
4. Explain the relationship between measurement reliability and measurement validity using an example from the study of determinants of stunting in children under five years.