Final answer:
The total volume of the 3 goldfish is 3 cubic centimeters.
Step-by-step explanation:
To find the total volume of the 3 goldfish, we need to determine the volume of each goldfish and then add them together.
Since we know that adding the goldfish to the tank raised the water level by 1 cm, we can assume that each goldfish has a volume of 1 cm³. Therefore, the total volume of the 3 goldfish is 3 cm³.
So, the answer is A) 3 cubic centimeters.