which sentence most needs to be revised because its description is too vague?\no we hiked two miles uphill…

which sentence most needs to be revised because its description is too vague?\no we hiked two miles uphill in the blooming forest today.\no we sprinted back and forth in the stuffy high school gym.\no we had to walk up several flights of stairs to get there.\no we stretched and then slowly jogged once around the track.
Answer
Brief Explanations:
The phrase "several flights of stairs" in the third - sentence is vague as it doesn't specify how many flights exactly. The other sentences have more specific details like "two miles", "stuffy high - school gym", and "once around the track".
Answer:
We had to walk up several flights of stairs to get there.