Simon has two identical aquariums. There are $$26$$ quarts of water in one, and $$42$$ quarts of water in the other. How many quarts of water does Simon need to pour from the second aquarium into the first in order to have the same amount of water in both? 
选项为:A:$$6$$  B:$$16$$  C:$$10$$  D:$$8$$  请回答其中一个选项.