Which will be more sensitive to acidity?

Answer: Option C

Game fish will be more sensitive to acidity.
Game fish, sport fish or quarry refer to popular fish pursued by recreational anglers and can be freshwater or saltwater fish. Game fish can be eaten after being caught, or released after capture.
The surrounding water has a lower pH, and a fish's cells often come into balance with the seawater by taking in carbonic acid. This changes the pH of the fish's blood, a condition called acidosis.