Which group represents the population relevant for studying median square footage of homes?

The correct answer focuses on a specific geographic area—River Heights—and targets a defined category of property—single-family homes. Studying the median square footage of homes is most relevant when done within a particular context, as it allows for accurate comparisons and insights into market trends. By examining all single-family homes in River Heights, one can gather pertinent data that reflects the characteristics, styles, and market conditions specific to that area, which may differ significantly from other regions.

In contrast, looking at all single-family homes in the U.S. would provide a broad dataset that could obscure local trends and variations specific to River Heights. Similarly, the overall population of River Heights could include non-residential properties or multifamily units, which would not be relevant for studying single-family homes. Lastly, narrowing the focus to just the homes that a specific individual, such as Sandy, works with would result in an incomplete and potentially biased sample, lacking the comprehensiveness needed for a meaningful analysis of median square footage across the area. Therefore, option A best represents the appropriate population for the study, ensuring that the data gathered is relevant and useful for drawing conclusions specific to that location.