Researchers studied four after-school programs that varied in two ways: weekly hours (4 or 8) and tutoring style (group or one-on-one). End-of-year reading gains: Program A (4 hrs, group), +1.8 points; Program B (4 hrs, one-on-one), +3.2 points; Program C (8 hrs, group), +2.5 points; Program D (8 hrs, one-on-one), +5.5 points. The researchers argued that one-on-one tutoring matters more than total hours. The data most directly supporting this claim is ______
Which choice most logically completes the text using the data above?
- Acheck_circle
the comparison B vs. C: B has fewer hours but uses one-on-one (3.2), beating C's group format with double the hours (2.5).
- B
the comparison A vs. D, showing both effects together.
- C
Program D's largest gain of 5.5 points.
- D
Program A's smallest gain of 1.8 points.
Explanation
"One-on-one matters more than hours" is best supported by a case where less time + one-on-one beats more time + group. Choice B does this exactly: 4 hrs of one-on-one (3.2) > 8 hrs of group (2.5).