A research team studied recovery time (in days) after surgery for four groups receiving different physical therapy intensities: Low (3 sessions/week), 42 days; Moderate (5 sessions/week), 28 days; High (7 sessions/week), 21 days; Very High (10 sessions/week), 22 days. The researchers concluded that recovery improves with more therapy up to a point, after which additional sessions yield no further benefit. The data point most uniquely supporting the "no further benefit" claim is ______
Which choice most logically completes the text using the data above?
- A
Moderate intensity's 28 days.
- B
the overall decline from Low (42) to High (21).
- Ccheck_circle
the small difference between High (21 days) and Very High (22 days).
- D
Low intensity's 42 days.
Explanation
"No further benefit" beyond a point requires showing that going from High to Very High doesn't reduce recovery time further. Choice C captures this exactly (21 vs. 22 days, essentially flat), supporting the plateau portion of the claim.