Lab partners follow the instructions during their chemistry lab very carefully. They measure 200 mL of a clear liquid into a beaker. Then they measure 50 mL of a different clear liquid into a graduated cylinder. They pour the liquid from the graduated cylinder into the beaker. The image below shows the results.

Which should the partners conclude about the two liquids?
A.
Both liquids cooled when they were mixed.
B.
Filtering would make it possible to separate the liquids.
C.
A chemical reaction occurred when the liquids were mixed.
D.
A new substance with the same properties as the original liquids formed.