Cid rain throughout the northeast united states has lowered the ph of many ponds and lakes. the lowered ph will eventually result 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