A 2022 study reported four neighborhoods' civic-engagement rates along with two factors: presence of a community garden (yes/no) and median age (young/older): Block A, garden + young, 38%; B, garden + older, 51%; C, no garden + young, 25%; D, no garden + older, 41%. The researchers concluded that having a community garden boosts engagement more in younger neighborhoods. The strongest support is ______
Which choice most logically completes the text using the data above?
- A
Block B's highest rate of 51%.
- B
Block C's lowest rate of 25%.
- Ccheck_circle
the within-age contrasts: A vs. C (young: 38-25=13 points) versus B vs. D (older: 51-41=10 points)—gardens boost engagement slightly more in young neighborhoods (though the effects are similar).
- D
the average across blocks.
Explanation
To assess "boosts more in young neighborhoods" you need to compare garden's effect within each age stratum. Choice B does this and finds 13-point boost (young) vs. 10-point boost (older), supporting the differential effect.