The correct answer is B) If the temperature remains constant, the volume of a given mass of gas is inversely proportional to its pressure. This statement accurately reflects Boyle's law, which describes the relationship between the pressure and volume of an ideal gas when the temperature is held constant. Boyle's law states that the pressure of a gas is inversely proportional to its volume. As the pressure increases, the volume decreases, and vice versa. The other options are incorrect because they do not correctly describe the relationship between pressure, volume, and temperature as outlined in Boyle's law. Option A is incorrect because the volume is inversely, not directly, proportional to the pressure. Options C and D are incorrect because they involve the relationship between volume and temperature, which is described by Charles's law, not Boyle's law.