A study compared four cities' civic-engagement rates (% voting in local elections) along with two factors: median income (high/low) and presence of mail-in voting (yes/no). City A, high income + mail-in, 62%; B, high income + no mail-in, 51%; C, low income + mail-in, 49%; D, low income + no mail-in, 32%. The researchers concluded that mail-in voting boosts turnout more strongly in low-income cities. The strongest support is ______
Which choice most logically completes the text using the data above?
- Acheck_circle
the within-income contrasts: A vs. B (both high income: 62-51=11 points) versus C vs. D (both low income: 49-32=17 points)—mail-in voting boosts turnout more in low-income cities.
- B
the average turnout.
- C
City D's lowest turnout of 32%.
- D
City A's highest turnout of 62%.
Explanation
"Boosts turnout more strongly in low-income cities" requires comparing mail-in's effect within each income stratum. Choice B captures the larger 17-point boost in low-income vs. 11-point in high-income.