Final answer:
The cube that is the most dense has the largest mass because density is defined as mass per unit volume, and all cubes have the same volume. Density is dependent on material composition and can vary with temperature.
Step-by-step explanation:
The correct statement regarding the cubes made of different materials but with the same dimensions is: B. The cube that is the most dense has the largest mass. This is true because while all cubes have the same volume (since they have the same dimensions), the one with the most density will pack a greater amount of mass into that volume. Density is calculated as mass divided by volume, and since the volume is consistent across the cubes, the density is directly proportional to the mass.
Density can indicate the composition of an object, and it may change with the temperature because most materials expand as temperature increases, leading to a decrease in density. However, the statement about density does not imply anything regarding the cubes' temperatures or colors, and the masses will vary due to differing densities.