Hanson is designing an experiment to test the porosity of a soil sample. his experiment involves the following: place the soil sample in a water-tight container. slowly pour water into the container. measure the volume of water that the soil absorbs. which of the following would improve hanson's experiment? a. if he measured the volume of the soil beforehand** b. if he measured the mass of the water beforehand c. if he measured the porosity of the water beforehand d. if he measured the mass of the soil beforehand