A trial tested four anti-inflammatory regimens. Average reductions in joint pain (on 0-10 scale): Regimen A, -1.2; B, -2.8; C, -3.0; D, -3.1. The researchers argued that B, C, and D are essentially equivalent in effectiveness, undermining a marketing claim that D is significantly best. The strongest support is ______
Which choice most logically completes the text using the data above?
- A
Regimen A's small drop of 1.2.
- Bcheck_circle
the small spread of 0.3 points among B (-2.8), C (-3.0), and D (-3.1).
- C
Regimen D's drop of 3.1.
- D
the gap between A and D.
Explanation
"B, C, D essentially equivalent" requires showing small spread among those three. Choice B captures this 0.3-point cluster.