Cid rain throughout the northeast United States has lowered the pH of many ponds and lakes. The lowered pH will eventually resul
t in the death of many aquatic animals. The table shows the pH tolerance levels for water that supports a variety of nine animal species. What is the mathematical range of the minimum pH levels that supports life for the nine species?
A) 2.5
B) 4.5
C) 5.5
D) 7
