How does Nathan's hypothesis lead to new investigations The data support his hypothesis, so he should investigate if the same change happens in the density of solid water. The data do not support his hypothesis, so he should investigate the effect of temperature on the density of a different substance. The data do not support his hypothesis, so he should investigate why the density is greatest at 4°C. The data support his hypothesis, so he should investigate the effect of density on the volume of a different substance.