Mary loved having her goldfish tank in her office. She said watching the fish swim around was calming to her on stressful days. Mary thought that if 2 goldfish in her tank could make her less stressed then certainly 8 goldfish would be even better. After three days of having 8 goldfish in her tank, she noticed 5 of the fish began to sink to the bottom of the tank becoming less active than the remaining 3. A few days later the 5 sick fish died and the 3 remaining fish thrived. Use the data to help you choose three reasons the carrying capacity of the fish tank wasn’t able to accommodate all 8 goldfish.






A.
There was a limited supply of food available to sustain all 8 fish.

B.
There was an unlimited amount of space for the fish to swim.

C.
The amount of dissolved oxygen in the tank was not replenished quickly enough to sustain all 8 fish.

D.
The ammonia levels in the tank did not compromise the life of the fish.