Sample a is a hard crystalline solid, which does not break easily. sample b is a solid that readily dissolves in water. sample c is a liquid that evaporates at room temperature. sample d is a colored liquid that conducts electricity. which sample is a covalent compound?

An experiment is conducted to see if cats preferred skim milk or 2% milk. a cup of skim milkwas put out for 5 kittens and then measured how much the kittens drank over the course of aday. following a cup of 2% milk was purout for the skittens and then masured how much thekittens drank over the course of a day. the same kittens were used and the milk was served atthe same temperature. it was discovered that the cats liked the 2% milk more than the skimmilk. what is the dependent variable in this experiment?