Lowest pH Tolerated for Survival

Organism Lowest pH For Survival
Trout 5.0
Bass 5.5
Perch 4.5
Frogs 4.0
Salamanders 5.0
Clams 6.0
Crayfish 5.5
Snails 6.0
Mayfly 5.0

The table shows the tolerance range of some common freshwater organisms to different pH ranges in water.
Acid rain causes the pH of rivers, lakes, and streams on Earth to change. Based on the data table, which animal population will be the LAST to die out due to an increase in acid rain?
Responses
A clamsclams
B frogsfrogs
C snailssnails
D trout

Based on the data table, the population of clams will be the LAST to die out due to an increase in acid rain.