Question

what does the following sentence suggest? from 1901 until 1913, the environmental pioneer john muir fought to keep the hetch hetchy valley in california from being transformed into a reservoir; it was a battle he eventually lost. john muir was the only environmental pioneer. john muir was one of several environmental pioneers.

Explanation:

The sentence refers to John Muir as "the environmental pioneer" in the context of this specific battle, but this does not imply he was the only one. Describing him as "an environmental pioneer" would signal he was one of many, but the phrasing here does not contradict the idea that there were others; it only identifies his role in this specific effort. The key is that the statement does not claim exclusivity, so the correct inference is that he was one of several environmental pioneers.

Answer:

John Muir was one of several environmental pioneers.