Fact 1: Ameasuring cup is used for measuring the volume of substances. Fact 2: Volume is the amount of space an object or substance takes up. Given the two facts above, what measures the amount of space a substance takes up?

Select from the following. i. hydrogen and oxygen ii. objects that have mass iii. Veins and arteries. iv. sweating v. evaporation vi. A measuring cup vii. heat energy viii. an electron microscope
The answer is:
vi.