A 2021 ecology study tracked the recovery of four wetland sites after restoration. Researchers measured native plant cover (as a percentage of ground cover) one year after restoration: Site A reached 25%, Site B reached 38%, Site C reached 52%, and Site D reached 71%. The researchers concluded that restoration techniques varied considerably in their first-year effectiveness. To illustrate the range of outcomes, they noted that ______
Which choice most logically completes the text using the data above?
- A
Site A and Site B had similar recovery rates.
- Bcheck_circle
the highest-performing site (D) achieved nearly three times the cover of the lowest-performing site (A).
- C
all sites showed some recovery in the first year.
- D
Site C performed in the middle of the range.
Explanation
The conclusion stresses the wide range of outcomes. Choice B directly quantifies that range (71% vs. 25%, nearly 3x), supporting the "varied considerably" claim. The other choices either understate the spread or are too vague.