Final answer:
When a hypothetical material with a negative bulk modulus is squeezed, it would expand rather than contract.
Step-by-step explanation:
If a hypothetical material has a negative bulk modulus, what happens when you squeeze a piece of it? The correct answer is: a) Material expands. The bulk modulus is a measure of a material's resistance to uniform compression. A positive bulk modulus indicates that a material will resist compression and decrease in volume when squeezed. However, a hypothetical material with a negative bulk modulus would behave in the opposite manner, expanding in volume when compressed, which is a counterintuitive behavior not typically seen in conventional materials.