Which of the Following Statements Is True About Participants with Unusual

Which of the following statements is true about participants with unusual data points outliers) in public health research?

A) A qualitative follow-up interview with participants considered outliers may provide insight into a specific subgroup's experiences.
B) Quantitative analysis typically relies only on data produced from participants considered outliers.
C) Participants considered outliers should always be excluded from analyses since they do not represent the population from which they were sampled.
D) Outlier data exists because of interviewer errors and should be considered a source of bias.