Answer:
Open system
Step-by-step explanation:
We are putting can of soft drink in the refrigerator so that it will cool down. As we can see the can of soft drink cool down when it releases its heat to the refrigerator. As it can exchange its temperature with it's surrounding so it will be an open system. If it would be a closed system then it won't be able to release its heat to the surrounding so it won't be able to cool down.
